Add PCD for selecting terminal type at build time

Add a fixed pointer PCD to allow build-time selection of VT100 or TTY terminal
type.  The default remains VT100 emulation.
Add support for building the ARM QEMU platforms with the TTY terminal
with the "-D TTY_TERMINAL" build option.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
[Roy Franz: minor edits: add TtyTerminal GUID, rename LINUX_TERMINAL to TTY_TERMINAL]
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Roy Franz <roy.franz@linaro.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17898 6f19259b-4bc3-4df7-8a09-765794883524

ArmVirtPkg/ArmVirt.dsc.inc

@@ -15,6 +15,7 @@
 
 [Defines]
   DEFINE DEBUG_PRINT_ERROR_LEVEL = 0x8000004F
+  DEFINE TTY_TERMINAL            = FALSE
 
 [BuildOptions.AARCH64.EDKII.DXE_RUNTIME_DRIVER]
   GCC:*_*_AARCH64_DLINK_FLAGS = --script=$(EDK_TOOLS_PATH)/Scripts/gcc-aarch64-64K-align-ld-script
@@ -362,6 +363,11 @@
   gEfiSecurityPkgTokenSpaceGuid.PcdRemovableMediaImageVerificationPolicy|0x04
 !endif
 
+!if $(TTY_TERMINAL) == TRUE
+  # Set terminal type to TtyTerm, the value encoded is EFI_TTY_TERM_GUID
+  gArmVirtTokenSpaceGuid.PcdTerminalTypeGuidBuffer|{0x80, 0x6d, 0x91, 0x7d, 0xb1, 0x5b, 0x8c, 0x45, 0xa4, 0x8f, 0xe2, 0x5f, 0xdd, 0x51, 0xef, 0x94}
+!endif
+
 [Components.common]
   #
   # Networking stack