improve accuracy

Author: yunjing.lh

src/relay/qnn/op/add.cc

@@ -74,12 +74,12 @@ Expr QnnAddCanonicalize(const Attrs& attrs, const Array<Expr>& new_args,
     auto requantized_lhs = Requantize(args.lhs, input_type.shape,
                                       real_lhs_scale, args.lhs_zero_point,
                                       itmd_out_scale, itmd_zero_point,
-                                      DataType::Int(32));
+                                      DataType::Int(32), rounding);
 
     auto requantized_rhs = Requantize(args.rhs, input_type.shape,
                                       real_rhs_scale, args.rhs_zero_point,
                                       itmd_out_scale, itmd_zero_point,
-                                      DataType::Int(32));
+                                      DataType::Int(32), rounding);
 
     output = Add(requantized_lhs, requantized_rhs);
     output = Requantize(output, input_type.shape,