COMPMID-2753: Add support for QASYMM8_SIGNED in CL kernels/functions

Change-Id: I7ed2d43f33458ba0571323f6fa9dc2e45fcd672a
Signed-off-by: Manuel Bottini <manuel.bottini@arm.com>
Reviewed-on: https://review.mlplatform.org/c/2516
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Georgios Pinitas <georgios.pinitas@arm.com>
diff --git a/src/core/CL/cl_kernels/scale_quantized.cl b/src/core/CL/cl_kernels/scale_quantized.cl
index 86dbf60..ccbd71e 100644
--- a/src/core/CL/cl_kernels/scale_quantized.cl
+++ b/src/core/CL/cl_kernels/scale_quantized.cl
@@ -165,7 +165,7 @@
 
     const float fr = ((insf32.s0 * b * b1) + (insf32.s1 * a * b1) + (insf32.s2 * b * a1) + (insf32.s3 * a * a1));
 
-    uchar res = convert_uchar_sat(convert_int_sat_rtp(fr / SCALE) + OFFSET);
+    DATA_TYPE res = CONVERT_SAT(convert_int_sat_rtp(fr / SCALE) + OFFSET, DATA_TYPE);
 
     *((__global DATA_TYPE *)out.ptr) = res;
 }