Update Python table attribute to use int16vecs

Change-Id: Iba6e06e1f40c2f2c2ca753787f0f57bae6e66747
Signed-off-by: Jerry Ge <jerry.ge@arm.com>
diff --git a/python/serializer/tosa_serializer.py b/python/serializer/tosa_serializer.py
index 22f9bc3..220bc2a 100644
--- a/python/serializer/tosa_serializer.py
+++ b/python/serializer/tosa_serializer.py
@@ -345,7 +345,7 @@
         self.utype = Attribute.Attribute().TableAttribute
         self.optFcns = (a.Start, a.End)
 
-        self.intvecs.append((a.AddTable, table))
+        self.int16vecs.append((a.AddTable, table))
 
     def MatMulAttribute(self, A_zp, B_zp):
         from tosa import MatMulAttribute as a, Attribute