EdkCompatibilityPkg: Remove gZeroGuid def in FrameworkHiiOnUefiHiiThunk

MdeModulePkg has defined gZeroGuid in 'Guid/ZeroGuid.h', therefore, the
gZeroGuid defined in Compatibility/FrameworkHiiOnUefiHiiThunk is
redundent.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Jaben Carsey <jaben.carsey@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17846 6f19259b-4bc3-4df7-8a09-765794883524

EdkCompatibilityPkg/Compatibility/FrameworkHiiOnUefiHiiThunk/FrameworkHiiOnUefiHiiThunk.inf

@@ -86,6 +86,7 @@
   gEfiIfrFrameworkGuid
   gEfiHiiStandardFormGuid
   gFrameworkBdsFrontPageFormsetGuid
+  gZeroGuid                                     ## SOMETIMES_CONSUMES   ## GUID
 
 [Protocols]
   gEfiHiiImageProtocolGuid

EdkCompatibilityPkg/Compatibility/FrameworkHiiOnUefiHiiThunk/Utility.c

@@ -2,7 +2,7 @@
 
   This file contains the keyboard processing code to the HII database.
 
-Copyright (c) 2006 - 2010, Intel Corporation. All rights reserved.<BR>
+Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
 This program and the accompanying materials
 are licensed and made available under the terms and conditions of the BSD License
 which accompanies this distribution.  The full text of the license may be found at
@@ -17,8 +17,8 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #include "HiiDatabase.h"
 #include "HiiHandle.h"
 #include <Library/DebugLib.h>
+#include <Guid/ZeroGuid.h>
 
-CONST EFI_GUID  gZeroGuid = {0, 0, 0, {0, 0, 0, 0, 0, 0, 0, 0}};
 CONST CHAR16 FrameworkReservedVarstoreName[] = FRAMEWORK_RESERVED_VARSTORE_NAME;
 
 /**