MdeModulePkg: Use IsZeroGuid API for zero GUID checking

Instead of comparing a GUID with gZeroGuid via the CompareGuid API, the
commit uses the IsZeroGuid API to check if the given GUID is a zero GUID.

Cc: Feng Tian <feng.tian@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Hao Wu <hao.a.wu@intel.com>
Reviewed-by: Feng Tian <feng.tian@Intel.com>

MdeModulePkg/Universal/SetupBrowserDxe/Expression.c

@@ -2829,7 +2829,7 @@ EvaluateExpression (
         if (StrPtr != NULL) {
           FreePool (StrPtr);
         }
-      } else if (CompareGuid (&OpCode->Guid, &gZeroGuid) != 0) {
+      } else if (IsZeroGuid (&OpCode->Guid)) {
         if (!GetQuestionValueFromForm(NULL, FormSet->HiiHandle, &OpCode->Guid, Value->Value.u16, &QuestionVal)){
           Value->Type = EFI_IFR_TYPE_UNDEFINED;
           break;