OvmfPkg/ResetSystemLib: clean up library dependencies

Annotate the #include directives with the interfaces that this lib
instance needs from the included lib class headers. This will help us keep
the #include set minimal, when we move code around later.

While at it, synchronize the [LibraryClasses] section with the #include
directives -- list BaseLib.

Also #include the ResetSystemLib class header, which declares the
interfaces that this lib instance implements.

This forces us to spell out the "MdeModulePkg.dec" dependency too, under
[Packages].

Cc: Ard Biesheuvel <ard.biesheuvel@arm.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Philippe Mathieu-Daudé <philmd@redhat.com>
Cc: Rebecca Cran <rebecca@bsdio.com>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=2675
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20200417153751.7110-3-lersek@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@arm.com>
Reviewed-by: Rebecca Cran <rebecca@bsdio.com>

OvmfPkg/Library/ResetSystemLib/ResetSystemLib.c

@@ -6,14 +6,15 @@
 
 **/
 
-#include <Base.h>
+#include <Base.h>                   // BIT1
 
-#include <Library/BaseLib.h>
-#include <Library/DebugLib.h>
-#include <Library/IoLib.h>
-#include <Library/PciLib.h>
-#include <Library/TimerLib.h>
-#include <OvmfPlatforms.h>
+#include <Library/BaseLib.h>        // CpuDeadLoop()
+#include <Library/DebugLib.h>       // ASSERT()
+#include <Library/IoLib.h>          // IoWrite8()
+#include <Library/PciLib.h>         // PciRead16()
+#include <Library/ResetSystemLib.h> // ResetCold()
+#include <Library/TimerLib.h>       // MicroSecondDelay()
+#include <OvmfPlatforms.h>          // OVMF_HOSTBRIDGE_DID
 
 VOID
 AcpiPmControl (

OvmfPkg/Library/ResetSystemLib/ResetSystemLib.inf

@@ -25,10 +25,12 @@
   ResetSystemLib.c
 
 [Packages]
+  MdeModulePkg/MdeModulePkg.dec
   MdePkg/MdePkg.dec
   OvmfPkg/OvmfPkg.dec
 
 [LibraryClasses]
+  BaseLib
   DebugLib
   IoLib
   PciLib