Add "TtyTerm" terminal type to TerminalDxe

This patch a adds new terminal type, TtyTerm, to TerminalDxe.  This terminal
type provides a place to add support for various *nix terminals that don't
behave like standard VT terminals.  The goal is to 'just work' with as many
terminals as possible, rather than properly emulating any one specific
terminal.

Signed-off-by: Roy Franz <roy.franz@linaro.org>
Contributed-under: TianoCore Contribution Agreement 1.0
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Feng Tian <feng.tian@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17895 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/Console/TerminalDxe/TerminalConIn.c

@@ -454,6 +454,7 @@ TranslateRawDataToEfiKey (
   case PCANSITYPE:
   case VT100TYPE:
   case VT100PLUSTYPE:
+  case TTYTERMTYPE:
     AnsiRawDataToUnicode (TerminalDevice);
     UnicodeToEfiKey (TerminalDevice);
     break;
@@ -1393,7 +1394,8 @@ UnicodeToEfiKey (
       if (TerminalDevice->TerminalType == PCANSITYPE    ||
           TerminalDevice->TerminalType == VT100TYPE     ||
           TerminalDevice->TerminalType == VT100PLUSTYPE ||
-          TerminalDevice->TerminalType == VTUTF8TYPE) {
+          TerminalDevice->TerminalType == VTUTF8TYPE    ||
+          TerminalDevice->TerminalType == TTYTERMTYPE) {
         switch (UnicodeChar) {
         case 'A':
           Key.ScanCode = SCAN_UP;