COMPMID-417: Port DepthConcatenate to QS8/QS16 for NEON/CL.

Change-Id: I3dddae63043c7aa18d908a4fc8abacf3c64f98ca
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/80081
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Steven Niu <steven.niu@arm.com>
diff --git a/arm_compute/core/CL/CLHelpers.h b/arm_compute/core/CL/CLHelpers.h
index 01980d9..eeb3e76 100644
--- a/arm_compute/core/CL/CLHelpers.h
+++ b/arm_compute/core/CL/CLHelpers.h
@@ -53,6 +53,14 @@
  */
 std::string get_cl_type_from_data_type(const DataType &dt);
 
+/** Translates fixed point tensor data type to the underlying OpenCL type.
+ *
+ * @param[in] dt @ref DataType to be translated to OpenCL type.
+ *
+ * @return The string specifying the underlying OpenCL type to be used.
+ */
+std::string get_underlying_cl_type_from_data_type(const DataType &dt);
+
 /** Translates a given gpu device target to string.
  *
  * @param[in] target Given gpu target.