CorebootModulePkg-CbParseLib: Fix bad reference in CbParseLib

Dereferencing pMemTableSize in debug statement displays bad values when
it is set to NULL.  Display the actual table size value instead.

TEST=Build and run on Galileo Gen2

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-by: Erik Bjorge <erik.c.bjorge@intel.com>
Reviewed-by: Prince Agyeman <prince.agyeman@intel.com>

CorebootModulePkg/Library/CbParseLib/CbParseLib.c

@@ -216,7 +216,8 @@ FindCbMemTable (
         *pMemTableSize = Entries[Idx].size;
       }
 
-      DEBUG ((EFI_D_INFO, "Find CbMemTable Id 0x%x, base %p, size 0x%x\n", TableId, *pMemTable, *pMemTableSize));
+      DEBUG ((EFI_D_INFO, "Find CbMemTable Id 0x%x, base %p, size 0x%x\n",
+        TableId, *pMemTable, Entries[Idx].size));
       return RETURN_SUCCESS;
     }
   }