COMPMID-979: Add NHWC data layout to the tensor's metadata (Part 2)

Change-Id: I24aa35a85834abf0c9954aba714aeae654615b44
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/122646
Tested-by: Jenkins <bsgcomp@arm.com>
Reviewed-by: Anthony Barbier <anthony.barbier@arm.com>
diff --git a/arm_compute/core/Helpers.h b/arm_compute/core/Helpers.h
index c91299f..24ba521 100644
--- a/arm_compute/core/Helpers.h
+++ b/arm_compute/core/Helpers.h
@@ -655,7 +655,7 @@
  *
  * @return The int conversion of the requested data layout index.
  */
-inline int get_data_layout_dimension_index(const ITensorInfo &info, const DataLayoutDimension data_layout_dimension);
+inline size_t get_data_layout_dimension_index(const DataLayout data_layout, const DataLayoutDimension data_layout_dimension);
 } // namespace arm_compute
 
 #include "arm_compute/core/Helpers.inl"