COMPMID-1518: Add support for GEMM3D in CLGEMMLowpMatrixMultiplyCore

Change-Id: Ib14ac821ee5d4aff80bd602cd3e76e7018abb5e6
Reviewed-on: https://eu-gerrit-1.euhpc.arm.com/150268
Tested-by: bsgcomp <bsgcomp@arm.com>
Reviewed-by: Isabella Gottardi <isabella.gottardi@arm.com>
Reviewed-by: Michele DiGiorgio <michele.digiorgio@arm.com>
diff --git a/src/core/CL/kernels/CLGEMMLowpReductionKernel.cpp b/src/core/CL/kernels/CLGEMMLowpReductionKernel.cpp
index cd26cd1..9cf5d1f 100644
--- a/src/core/CL/kernels/CLGEMMLowpReductionKernel.cpp
+++ b/src/core/CL/kernels/CLGEMMLowpReductionKernel.cpp
@@ -196,8 +196,8 @@
     Window slice_out = collapsed.first_slice_window_2D();
     Window slice_in  = slice_out;
 
-    slice_in.set(Window::DimY, Window::Dimension(0, 1, 1));
-    slice_in.set(Window::DimZ, Window::Dimension(0, 1, 1));
+    slice_in.set(Window::DimY, Window::Dimension(0, 0, 0));
+    slice_in.set(Window::DimZ, Window::Dimension(0, 0, 0));
 
     do
     {