[Patch edk2-platforms] IntelSiliconPkg/IntelVTdDxe: Fix CLANG detected incorrect return

["Michael D Kinney" <michael.d.kinney@intel.com>]

CreateSecondLevelPagingEntryTable() has a return type of
VTD_SECOND_LEVEL_PAGING_ENTRY * and an error condition
returns a value of NULL.

Change return value of EFI_SUCCESS (value 0) to NULL to
address CLANG compiler detection of incorrect return type.

Cc: Ray Ni <ray.ni@intel.com>
Cc: Rangasai V Chaganty <rangasai.v.chaganty@intel.com>
Cc: Isaac Oram <isaac.w.oram@intel.com>
Cc: Ashraf Ali S <ashraf.ali.s@intel.com>
Signed-off-by: Michael D Kinney <michael.d.kinney@intel.com>
---
 .../IntelSiliconPkg/Feature/VTd/IntelVTdDxe/TranslationTable.c  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/TranslationTable.c b/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/TranslationTable.c
index 3220789080..6788c86531 100644
--- a/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/TranslationTable.c
+++ b/Silicon/Intel/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/TranslationTable.c
@@ -196,7 +196,7 @@ CreateSecondLevelPagingEntryTable (
   UINT64                         EndAddress;
 
   if (MemoryLimit == 0) {
-    return EFI_SUCCESS;
+    return NULL;
   }
 
   Lvl4PagesStart = 0;
-- 
2.37.1.windows.1