FatPkg/EnhanceFatDxe:Deprecate EFI_UNICODE_COLLATION_PROTOCOL_GUID

EFI_UNICODE_COLLATION_PROTOCOL_GUID was deprecated in favor of
a newer version EFI_UNICODE_COLLATION_PROTOCOL2_GUID which
provides improved language support and better extensibility.

It was officially removed from UEFI specifications
2.10A and 2.11 and should no longer be used in
current implementations.

Cc: Sachin Ganesh <sachinganesh@ami.com>
Signed-off-by: Gowtham M <gowthamm@ami.com>

Author: GowthamM9974

FatPkg/EnhancedFatDxe/Fat.inf

@@ -78,7 +78,6 @@
   gEfiDiskIo2ProtocolGuid               ## TO_START
   gEfiBlockIoProtocolGuid               ## TO_START
   gEfiSimpleFileSystemProtocolGuid      ## BY_START
-  gEfiUnicodeCollationProtocolGuid      ## TO_START
   gEfiUnicodeCollation2ProtocolGuid     ## TO_START
 
 [Pcd]

FatPkg/EnhancedFatDxe/UnicodeCollation.c

@@ -55,7 +55,7 @@ InitializeUnicodeCollationSupportWorker (
     return Status;
   }
 
-  Iso639Language = (BOOLEAN)(ProtocolGuid == &gEfiUnicodeCollationProtocolGuid);
+  Iso639Language = (BOOLEAN)(ProtocolGuid == &gEfiUnicodeCollation2ProtocolGuid);
   GetEfiGlobalVariable2 (VariableName, (VOID **)&Language, NULL);
 
   ReturnStatus = EFI_UNSUPPORTED;
@@ -134,18 +134,6 @@ InitializeUnicodeCollationSupport (
              L"PlatformLang",
              (CONST CHAR8 *)PcdGetPtr (PcdUefiVariableDefaultPlatformLang)
              );
-  //
-  // If the attempt to use Unicode Collation 2 Protocol fails, then we fall back
-  // on the ISO 639-2 Unicode Collation Protocol.
-  //
-  if (EFI_ERROR (Status)) {
-    Status = InitializeUnicodeCollationSupportWorker (
-               AgentHandle,
-               &gEfiUnicodeCollationProtocolGuid,
-               L"Lang",
-               (CONST CHAR8 *)PcdGetPtr (PcdUefiVariableDefaultLang)
-               );
-  }
 
   return Status;
 }