IntelSiliconPkg/VTd: Fix build fail for add iommu 5 level paging support

Build fail is found in patch "IntelSiliconPkg/VTd: Add iommu 5 level
 paging support".
Fix build fail in file TranslationTable.c and TranslationTableEx.c.

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3067



Signed-off-by: Sheng Wei <w.sheng@intel.com>
Reviewed-by: Ray Ni <ray.ni@intel.com>
Cc: Rangasai V Chaganty <rangasai.v.chaganty@intel.com>