COMPMID-2600: Implement a new and generic depthwise convolution for CL QASYMM8 NHWC

The NCHW case is supported at function level by permuting the
inputs/outputs to NHWC.

This patch also removes CLDirectConvolutionLayerOutputStageKernel which
is deprecated and some kernels which were only used in the generic case
of depthwise convolution.

Change-Id: I91e0f02d0a2f4a4a352e08c248e648944137fe68
Signed-off-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Reviewed-on: https://review.mlplatform.org/c/2056
Reviewed-by: Giorgio Arena <giorgio.arena@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Gian Marco Iodice <gianmarco.iodice@arm.com>
diff --git a/src/core/CL/cl_kernels/helpers_asymm.h b/src/core/CL/cl_kernels/helpers_asymm.h
index 53e6719..57ecccc 100644
--- a/src/core/CL/cl_kernels/helpers_asymm.h
+++ b/src/core/CL/cl_kernels/helpers_asymm.h
@@ -381,11 +381,13 @@
 DEQUANTIZE_IMPL(ushort, 4)
 DEQUANTIZE_IMPL(short, 4)
 
+ASYMM_ROUNDING_DIVIDE_BY_POW2_IMPL(1)
 ASYMM_ROUNDING_DIVIDE_BY_POW2_IMPL(2)
 ASYMM_ROUNDING_DIVIDE_BY_POW2_IMPL(4)
 ASYMM_ROUNDING_DIVIDE_BY_POW2_IMPL(8)
 ASYMM_ROUNDING_DIVIDE_BY_POW2_IMPL(16)
 
+ASYMM_MULT_IMPL(1)
 ASYMM_MULT_IMPL(2)
 ASYMM_MULT_IMPL(4)
 ASYMM_MULT_IMPL(8)