Add DepthToSpace layer node to Graph API

Change-Id: I5db780fb9c94160130e9986bbfc739124bfa8041
Signed-off-by: thecha01 <theo.charalambous@arm.com>
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/3914
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/graph/backends/ValidateHelpers.h b/arm_compute/graph/backends/ValidateHelpers.h
index 70eae6c..0259bfb 100644
--- a/arm_compute/graph/backends/ValidateHelpers.h
+++ b/arm_compute/graph/backends/ValidateHelpers.h
@@ -199,6 +199,27 @@
 
     return status;
 }
+/** Validates a depth to space layer node
+ *
+ * @tparam DequantizationLayer Dequantize layer type
+ *
+ * @param[in] node Node to validate
+ *
+ * @return Status
+ */
+template <typename DepthToSpaceLayer>
+Status validate_depth_to_space_layer(DepthToSpaceLayerNode &node)
+{
+    ARM_COMPUTE_LOG_GRAPH_VERBOSE("Validating DetectionOutputLayer node with ID : " << node.id() << " and Name: " << node.name() << std::endl);
+    ARM_COMPUTE_RETURN_ERROR_ON(node.num_inputs() != 1);
+    ARM_COMPUTE_RETURN_ERROR_ON(node.num_outputs() != 1);
+
+    // Extract IO and info
+    arm_compute::ITensorInfo *input  = get_backing_tensor_info(node.input(0));
+    arm_compute::ITensorInfo *output = get_backing_tensor_info(node.output(0));
+
+    return DepthToSpaceLayer::validate(input, output, node.block_shape());
+}
 /** Validates a dequantize layer node
  *
  * @tparam DequantizationLayer Dequantize layer type