message: SVDF: Log unsupported type as string.
  Also add comment that the 4 allocated scratch buffers only used with hybrid ops.
diff: @@ -113,6 +113,7 @@ constexpr int kOutputTensor = 0;
  void* Init(TfLiteContext* context, const char* buffer, size_t length) {
  auto* op_data = new OpData();
  op_data->float_weights_time_initialized = false;
  + // Note: only needs 4 scratch tensors when is_hybrid_op, only 1 otherwise.
  context->AddTensors(context, /*tensors_to_add=*/4,
  &op_data->scratch_tensor_index);
  return op_data;
  @@ -416,8 +417,8 @@ TfLiteStatus Eval(TfLiteContext* context, TfLiteNode* node) {
  break;
  }
  default:
  - context->ReportError(context, "Type %d not currently supported.",
  - weights_feature->type);
  + context->ReportError(context, "Type %s not currently supported.",
  + TfLiteTypeGetName(weights_feature->type));
  return kTfLiteError;
  }
  }
  