MdeModulePkg DxeIpl: Skip install MemoryInfoHob if this hob exists

Add the check at DxeLoadCore() on MdeModulePkg\Core\DxeIplPeim\DxeLoad.c
to skip install the "gEfiMemoryTypeInformationGuid" hob if it is already
installed.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Star Zeng <star.zeng@intel.com>

git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18018 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Core/DxeIplPeim/DxeLoad.c

@@ -273,6 +273,10 @@ DxeLoadCore (
     //
   }
 
+  if (GetFirstGuidHob ((CONST EFI_GUID *)&gEfiMemoryTypeInformationGuid) == NULL) {
+    //
+    // Don't build GuidHob if GuidHob has been installed.
+    //
     Status = PeiServicesLocatePpi (
                &gEfiPeiReadOnlyVariable2PpiGuid,
                0,
@@ -300,6 +304,7 @@ DxeLoadCore (
           );
       }
     }
+  }
 
   //
   // Look in all the FVs present in PEI and find the DXE Core FileHandle