1. Refer to Uefi spec 2.10 section 4.3.1, Updated the comments of
EFI_SYSTEM_TABLE to satisfy ConIn/ConOut/StdErr requirements.
2. Refer to Uefi spec 2.10 section 13.3.3, Add a new retval
EFI_UNSUPPORTED to EFI_SIMPLE_TEXT_INPUT_EX_PROTOCOL.ReadKeyStrokeEx
and EFI_SIMPLE_TEXT_INPUT_PROTOCOL.ReadKeyStroke().
Signed-off-by: Junfeng Guan <junfengx.guan@intel.com>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn>