message: Added reference kernel fallback for conv
  I added the reference kernel fallback for the conv's EvalQuantizedPerChannel routine, as suggested by
diff: @@ -153,7 +153,6 @@ TfLiteStatus EvalQuantizedPerChannel(
  TfLiteContext* context, TfLiteNode* node, TfLiteConvParams* params,
  OpData* data, const TfLiteTensor* input, const TfLiteTensor* filter,
  const TfLiteTensor* bias, TfLiteTensor* output, TfLiteTensor* im2col) {
  -#if defined(ARM_MATH_DSP) && defined(ARM_MATH_LOOPUNROLL)
  ConvParams op_params;
  op_params.input_offset = -input->params.zero_point;
  op_params.output_offset = output->params.zero_point;
  @@ -164,6 +163,8 @@ TfLiteStatus EvalQuantizedPerChannel(
  op_params.padding_values.height = data->padding.height;
  op_params.padding_values.width = data->padding.width;
  +#if defined(ARM_MATH_DSP) && defined(ARM_MATH_LOOPUNROLL)
  +
  RuntimeShape filter_shape = GetTensorShape(filter);
  RuntimeShape input_shape = GetTensorShape(input);
  RuntimeShape output_shape = GetTensorShape(output);
  @@ -235,7 +236,15 @@ TfLiteStatus EvalQuantizedPerChannel(
  }
  }
  #else
  -#error ARM_MATH_DSP and ARM_MATH_LOOPUNROLL must be set
  +
  + reference_integer_ops::ConvPerChannel(
  + op_params, data->per_channel_output_multiplier,
  + data->per_channel_output_shift, GetTensorShape(input),
  + GetTensorData<int8>(input), GetTensorShape(filter),
  + GetTensorData<int8>(filter), GetTensorShape(bias),
  + GetTensorData<int32>(bias), GetTensorShape(output),
  + GetTensorData<int8>(output));
  +
  #endif
  return kTfLiteOk;
  }
  