Sync in bug fix from EDK I:

1) issue with setup browser and IFR refresh opcode
2) [HII]HIIConfigRoutingExportConfig generate error format of <MultiConfigAltResp>
3) [HII] ConfigRouting->ExtractConfig() will cause overflow
4) [Hii Database] EFI_HII_DATABASE_NOTIFY should be invoked when a string package is created internally when a new String Token is created
5) [PT]HIIConfigAccessProtocolTest fail on NT32uefi
6) Incorrect HII package types in EDK

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@6378 6f19259b-4bc3-4df7-8a09-765794883524

MdeModulePkg/Universal/PlatformDriverOverride/PlatOverMngr/PlatOverMngr.c

@@ -1128,6 +1128,10 @@ PlatOverMngrExtractConfig (
   EFI_CALLBACK_INFO                *Private;
   EFI_HII_CONFIG_ROUTING_PROTOCOL  *HiiConfigRouting;
 
+  if (Request == NULL) {
+    return EFI_NOT_FOUND;
+  }
+
   Private = EFI_CALLBACK_INFO_FROM_THIS (This);
   HiiConfigRouting = Private->HiiConfigRouting;