Update Hob Instance to remove the unused InternalHobLib.h file.

git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@5710 6f19259b-4bc3-4df7-8a09-765794883524

MdePkg/Library/DxeCoreHobLib/HobLib.c

@@ -1,7 +1,7 @@
 /** @file
-  HOB Library.
+  HOB Library implementation for DxeCore driver.
 
-  Copyright (c) 2006 - 2007, Intel Corporation<BR>
+  Copyright (c) 2006 - 2008, Intel Corporation<BR>
   All rights reserved. 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
@@ -16,12 +16,10 @@
 
 #include <PiDxe.h>
 
-
 #include <Library/HobLib.h>
 #include <Library/DebugLib.h>
 #include <Library/BaseMemoryLib.h>
-
-#include "InternalHobLib.h"
+#include <Library/DxeCoreEntryPoint.h>
 
 /**
   Returns the pointer to the HOB list.
@@ -187,6 +185,7 @@ GetBootModeHob (
   EFI_HOB_HANDOFF_INFO_TABLE    *HandOffHob;
 
   HandOffHob = (EFI_HOB_HANDOFF_INFO_TABLE *) GetHobList ();
+  ASSERT (HandOffHob != NULL);
 
   return  HandOffHob->BootMode;
 }