MdeModulePkg: Update the comments of ReadKeyStroke and ReadKeyStrokeEx

Refer to Uefi spec 2.10 section 12.3.3, Add a new retval
EFI_UNSUPPORTED to EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL.ReadKeyStrokeEx
and EFI_SIMPLE_TEXT_INPUT_PROTOCOL.ReadKeyStroke().

Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Signed-off-by: Qingyu <qingyu.shang@intel.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>

MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2KbdTextIn.c

@@ -258,7 +258,8 @@ KeyboardEfiReset (
   @param This    Pointer to instance of EFI_SIMPLE_TEXT_INPUT_PROTOCOL
   @param Key     The output buffer for key value
 
-  @retval EFI_SUCCESS success to read key stroke
+  @retval EFI_SUCCESS      success to read key stroke
+  @retval EFI_UNSUPPORTED  The device does not support the ability to read keystroke data.
 **/
 EFI_STATUS
 EFIAPI
@@ -433,6 +434,7 @@ KeyboardEfiResetEx (
     @retval EFI_DEVICE_ERROR      The keystroke information was not returned due to
                                   hardware errors.
     @retval EFI_INVALID_PARAMETER KeyData is NULL.
+    @retval EFI_UNSUPPORTED       The device does not support the ability to read keystroke data.
 
 **/
 EFI_STATUS

MdeModulePkg/Bus/Isa/Ps2KeyboardDxe/Ps2Keyboard.h

@@ -338,6 +338,7 @@ KeyboardEfiReset (
   @param Key     The output buffer for key value
 
   @retval EFI_SUCCESS success to read key stroke
+  @retval EFI_UNSUPPORTED  The device does not support the ability to read keystroke data.
 **/
 EFI_STATUS
 EFIAPI
@@ -441,6 +442,8 @@ KeyboardEfiResetEx (
     @retval EFI_DEVICE_ERROR      - The keystroke information was not returned due to
                             hardware errors.
     @retval EFI_INVALID_PARAMETER - KeyData is NULL.
+    @retval EFI_UNSUPPORTED       - The device does not support the ability to read
+                            keystroke data.
 
 **/
 EFI_STATUS

MdeModulePkg/Bus/Usb/UsbKbDxe/EfiKey.c

@@ -692,6 +692,7 @@ USBKeyboardReset (
   @retval EFI_NOT_READY        There was no keystroke data available.
   @retval EFI_DEVICE_ERROR     The keystroke information was not returned due to
                                hardware errors.
+  @retval EFI_UNSUPPORTED      The device does not support the ability to read keystroke data.
 
 **/
 EFI_STATUS
@@ -975,6 +976,7 @@ USBKeyboardResetEx (
   @retval EFI_DEVICE_ERROR       The keystroke information was not returned due to
                                  hardware errors.
   @retval EFI_INVALID_PARAMETER  KeyData is NULL.
+  @retval EFI_UNSUPPORTED        The device does not support the ability to read keystroke data.
 
 **/
 EFI_STATUS

MdeModulePkg/Bus/Usb/UsbKbDxe/EfiKey.h

@@ -412,6 +412,7 @@ USBKeyboardReset (
   @retval EFI_NOT_READY        There was no keystroke data available.
   @retval EFI_DEVICE_ERROR     The keystroke information was not returned due to
                                hardware errors.
+  @retval EFI_UNSUPPORTED      The device does not support the ability to read keystroke data.
 
 **/
 EFI_STATUS
@@ -466,6 +467,7 @@ USBKeyboardResetEx (
   @retval EFI_DEVICE_ERROR       The keystroke information was not returned due to
                                  hardware errors.
   @retval EFI_INVALID_PARAMETER  KeyData is NULL.
+  @retval EFI_UNSUPPORTED        The device does not support the ability to read keystroke data.
 
 **/
 EFI_STATUS

MdeModulePkg/Universal/Console/ConSplitterDxe/ConSplitter.c

@@ -3551,6 +3551,8 @@ ConSplitterTextInExDequeueKey (
   @retval EFI_NOT_READY            There was no keystroke data availiable.
   @retval EFI_DEVICE_ERROR         The keydtroke information was not returned due
                                    to hardware errors.
+  @retval EFI_UNSUPPORTED          The device does not support the ability to read
+                                   keystroke data.
 
 **/
 EFI_STATUS
@@ -3623,6 +3625,8 @@ ConSplitterTextInPrivateReadKeyStroke (
   @retval EFI_NOT_READY            There was no keystroke data availiable.
   @retval EFI_DEVICE_ERROR         The keydtroke information was not returned due
                                    to hardware errors.
+  @retval EFI_UNSUPPORTED          The device does not support the ability to read
+                                   keystroke data.
 
 **/
 EFI_STATUS
@@ -3805,6 +3809,8 @@ ConSplitterTextInResetEx (
   @retval EFI_DEVICE_ERROR         The keystroke information was not returned due
                                    to hardware errors.
   @retval EFI_INVALID_PARAMETER    KeyData is NULL.
+  @retval EFI_UNSUPPORTED          The device does not support the ability to read
+                                   keystroke data.
 
 **/
 EFI_STATUS

MdeModulePkg/Universal/Console/ConSplitterDxe/ConSplitter.h

@@ -1265,6 +1265,8 @@ ConSplitterTextInReset (
   @retval EFI_NOT_READY            There was no keystroke data availiable.
   @retval EFI_DEVICE_ERROR         The keydtroke information was not returned due
                                    to hardware errors.
+  @retval EFI_UNSUPPORTED          The device does not support the ability to read
+                                   keystroke data.
 
 **/
 EFI_STATUS
@@ -1342,6 +1344,8 @@ ConSplitterTextInResetEx (
   @retval EFI_DEVICE_ERROR         The keystroke information was not returned due
                                    to hardware errors.
   @retval EFI_INVALID_PARAMETER    KeyData is NULL.
+  @retval EFI_UNSUPPORTED          The device does not support the ability to read
+                                   keystroke data.
 
 **/
 EFI_STATUS
@@ -1453,6 +1457,8 @@ ConSplitterTextInWaitForKey (
   @retval EFI_NOT_READY            There was no keystroke data availiable.
   @retval EFI_DEVICE_ERROR         The keydtroke information was not returned due
                                    to hardware errors.
+  @retval EFI_UNSUPPORTED          The device does not support the ability to read
+                                   keystroke data.
 
 **/
 EFI_STATUS

MdeModulePkg/Universal/Console/TerminalDxe/Terminal.h

@@ -223,6 +223,8 @@ TerminalConInReset (
   @retval EFI_SUCCESS         The keystroke information is returned successfully.
   @retval EFI_NOT_READY       There is no keystroke data available.
   @retval EFI_DEVICE_ERROR    The dependent serial device encounters error.
+  @retval EFI_UNSUPPORTED     The device does not support the ability to read
+                              keystroke data.
 
 **/
 EFI_STATUS
@@ -303,6 +305,8 @@ TerminalConInResetEx (
   @retval EFI_DEVICE_ERROR         The keystroke information was not returned due
                                    to hardware errors.
   @retval EFI_INVALID_PARAMETER    KeyData is NULL.
+  @retval EFI_UNSUPPORTED          The device does not support the ability to read
+                                   keystroke data.
 
 **/
 EFI_STATUS

MdeModulePkg/Universal/Console/TerminalDxe/TerminalConIn.c

@@ -109,6 +109,8 @@ TerminalConInReset (
   @retval EFI_SUCCESS         The keystroke information is returned successfully.
   @retval EFI_NOT_READY       There is no keystroke data available.
   @retval EFI_DEVICE_ERROR    The dependent serial device encounters error.
+  @retval EFI_UNSUPPORTED     The device does not support the ability to read
+                              keystroke data.
 
 **/
 EFI_STATUS
@@ -237,6 +239,8 @@ TerminalConInResetEx (
   @retval EFI_DEVICE_ERROR         The keystroke information was not returned due
                                    to hardware errors.
   @retval EFI_INVALID_PARAMETER    KeyData is NULL.
+  @retval EFI_UNSUPPORTED          The device does not support the ability to read
+                                   keystroke data.
 
 **/
 EFI_STATUS