Remove implementation headers from NESoftmaxLayer public header

Resolves: COMPMID-4587

Signed-off-by: Georgios Pinitas <georgios.pinitas@arm.com>
Change-Id: Ib216abcb0b9cd7f545d7c97e9d3447cb1b28f180
Reviewed-on: https://review.mlplatform.org/c/ml/ComputeLibrary/+/5828
Reviewed-by: Pablo Marquez Tello <pablo.tello@arm.com>
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/src/runtime/NEON/functions/NESoftmaxLayer.cpp b/src/runtime/NEON/functions/NESoftmaxLayer.cpp
index af8546d..bee692c 100644
--- a/src/runtime/NEON/functions/NESoftmaxLayer.cpp
+++ b/src/runtime/NEON/functions/NESoftmaxLayer.cpp
@@ -26,6 +26,7 @@
 #include "arm_compute/runtime/MemoryGroup.h"
 #include "arm_compute/runtime/Tensor.h"
 #include "src/core/cpu/kernels/CpuSoftmaxKernel.h"
+#include "src/core/helpers/MemoryHelpers.h"
 #include "src/core/helpers/SoftmaxHelpers.h"
 #include "src/runtime/cpu/operators/CpuSoftmax.h"