Automated sync from github.com/tensorflow/tensorflow (#3031)

BUG=automated sync from upstream
NO_CHECK_TFLITE_FILES=automated sync from upstream

Author: TFLM-bot

tensorflow/lite/kernels/internal/reference/integer_ops/fully_connected.h

@@ -42,12 +42,14 @@ void FullyConnectedPerChannel(
   const int32_t output_activation_min = params.quantized_activation_min;
   const int32_t output_activation_max = params.quantized_activation_max;
   TFLITE_DCHECK_GE(filter_shape.DimensionsCount(), 2);
-  TFLITE_DCHECK_EQ(output_shape.DimensionsCount(), 2);
+  TFLITE_DCHECK_GE(output_shape.DimensionsCount(), 1);
 
   TFLITE_DCHECK_LE(output_activation_min, output_activation_max);
   const int filter_dim_count = filter_shape.DimensionsCount();
-  const int batches = output_shape.Dims(0);
-  const int output_depth = output_shape.Dims(1);
+
+  const int output_dim_count = output_shape.DimensionsCount();
+  const int batches = FlatSizeSkipDim(output_shape, output_dim_count - 1);
+  const int output_depth = output_shape.Dims(output_dim_count - 1);
   TFLITE_DCHECK_LE(output_depth, filter_shape.Dims(filter_dim_count - 2));
   const int accum_depth = filter_shape.Dims(filter_dim_count - 1);
   for (int b = 0; b < batches; ++b) {