COMPMID-2451: Use kernel lws_hint() on enqueue

Avoid querying device's default lws on kernel enqueue as this is already
cached in the kernel during configuration.

Change-Id: Ia26ecb712caeb8f042356815e0cfd23522764d27
Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Reviewed-on: https://review.mlplatform.org/c/1803
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/core/CL/kernels/CLGatherKernel.cpp b/src/core/CL/kernels/CLGatherKernel.cpp
index 412821b..4e91cf2 100644
--- a/src/core/CL/kernels/CLGatherKernel.cpp
+++ b/src/core/CL/kernels/CLGatherKernel.cpp
@@ -131,6 +131,6 @@
     add_4D_tensor_argument(idx, _input, window_collapsed);
     add_1D_tensor_argument(idx, _indices, window_collapsed);
     add_4D_tensor_argument(idx, _output, window_collapsed);
-    enqueue(queue, *this, window_collapsed);
+    enqueue(queue, *this, window_collapsed, lws_hint());
 }
 } // namespace arm_compute