BaseTools: move PCD size calculation functions to PcdClassObject

move both GetPcdMaxSize and GetPcdSize to the PcdClassObject.
fix MAX_SIZE_TYPE to have int values

Cc: Liming Gao <liming.gao@intel.com>
Cc: Yonghong Zhu <yonghong.zhu@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Jaben Carsey <jaben.carsey@intel.com>
Reviewed-by: Yonghong Zhu <yonghong.zhu@intel.com>

BaseTools/Source/Python/AutoGen/ValidCheckingInfoObject.py

@@ -253,7 +253,7 @@ class VAR_CHECK_PCD_VALID_OBJ(object):
 
     def updateStorageWidth(self):
         try:
-            self.StorageWidth = int(MAX_SIZE_TYPE[self.PcdDataType])
+            self.StorageWidth = MAX_SIZE_TYPE[self.PcdDataType]
         except:
             self.StorageWidth = 0
             self.ValidData = False