message: TFLu: match cmsis mul kernel with reference
  Do calculation in double precision.
diff: @@ -62,8 +62,9 @@ TfLiteStatus CalculateOpData(TfLiteContext* context, TfLiteNode* node,
  context, params->activation, output, &data->output_activation_min,
  &data->output_activation_max));
  - double real_multiplier = static_cast<double>(
  - input1->params.scale * input2->params.scale / output->params.scale);
  + double real_multiplier = static_cast<double>(input1->params.scale) *
  + static_cast<double>(input2->params.scale) /
  + static_cast<double>(output->params.scale);
  QuantizeMultiplier(real_multiplier, &data->output_multiplier,
  &data->output_shift);
  }
  