Add back Commutative

Author: ShivaChen

mlir/include/mlir/Dialect/Tosa/IR/TosaOps.td

@@ -983,6 +983,7 @@ def Tosa_MinimumOp : Tosa_ElementwiseOp<"minimum", [
 def Tosa_MulOp : Tosa_Op<"mul", [
     DeclareOpInterfaceMethods<InferShapedTypeOpInterface,
                               ["inferReturnTypeComponents"]>,
+    Commutative,
     Pure]> {
   let summary = "Multiplication operator.";