COMPMID-2826 Comply with DCL51-CPP

Rename all header guards to be compliant with DCL51-CPP

Change-Id: I47b09375bb1b8d39d80c275ce69a3f25fb385d75
Signed-off-by: Michalis Spyrou <micspy01@e123758.cambridge.arm.com>
Reviewed-on: https://review.mlplatform.org/c/2393
Comments-Addressed: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Michele Di Giorgio <michele.digiorgio@arm.com>
Tested-by: Arm Jenkins <bsgcomp@arm.com>
diff --git a/arm_compute/core/NEON/kernels/NEStackLayerKernel.h b/arm_compute/core/NEON/kernels/NEStackLayerKernel.h
index 42a0539..04ad5d1 100644
--- a/arm_compute/core/NEON/kernels/NEStackLayerKernel.h
+++ b/arm_compute/core/NEON/kernels/NEStackLayerKernel.h
@@ -22,8 +22,8 @@
  * SOFTWARE.
  */
 
-#ifndef __ARM_COMPUTE_NESTACKLAYERKERNEL_H__
-#define __ARM_COMPUTE_NESTACKLAYERKERNEL_H__
+#ifndef ARM_COMPUTE_NESTACKLAYERKERNEL_H
+#define ARM_COMPUTE_NESTACKLAYERKERNEL_H
 
 #include "arm_compute/core/NEON/INEKernel.h"
 #include "arm_compute/core/Types.h"
@@ -90,4 +90,4 @@
     unsigned int   _idx_input;
 };
 } // namespace arm_compute
-#endif /* __ARM_COMPUTE_NESTACKLAYERKERNEL_H__ */
+#endif /* ARM_COMPUTE_NESTACKLAYERKERNEL_H */