COMPMID-2062 Rework CL ConcatenateLayer

Change-Id: I5a60cd0e822b8912132a6785057921bbf6ef8f7f
Signed-off-by: Michalis Spyrou <michalis.spyrou@arm.com>
Reviewed-on: https://review.mlplatform.org/c/951
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
diff --git a/arm_compute/runtime/CL/functions/CLWidthConcatenateLayer.h b/arm_compute/runtime/CL/functions/CLWidthConcatenateLayer.h
index 55b65da..a87ec30 100644
--- a/arm_compute/runtime/CL/functions/CLWidthConcatenateLayer.h
+++ b/arm_compute/runtime/CL/functions/CLWidthConcatenateLayer.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2018 ARM Limited.
+ * Copyright (c) 2018-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -42,6 +42,8 @@
 
 /** Basic function to execute concatenate tensors along x axis. This function calls the following kernel:
  *
+ * @deprecated This function is deprecated and will be removed in release 19.08
+ *
  * -# @ref CLWidthConcatenateLayerKernel
  * -# @ref CLWidthConcatenate2TensorsKernel (if there are exactly 2 input tensors)
  * -# @ref CLWidthConcatenate4TensorsKernel (if there are exactly 4 input tensors)