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/runtime/CL/functions/CLInstanceNormalizationLayer.h b/arm_compute/runtime/CL/functions/CLInstanceNormalizationLayer.h
index e13826a..ca0da51 100644
--- a/arm_compute/runtime/CL/functions/CLInstanceNormalizationLayer.h
+++ b/arm_compute/runtime/CL/functions/CLInstanceNormalizationLayer.h
@@ -21,8 +21,8 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-#ifndef __ARM_COMPUTE_CLINSTANCENORMALIZATIONLAYER_H__
-#define __ARM_COMPUTE_CLINSTANCENORMALIZATIONLAYER_H__
+#ifndef ARM_COMPUTE_CLINSTANCENORMALIZATIONLAYER_H
+#define ARM_COMPUTE_CLINSTANCENORMALIZATIONLAYER_H
 
 #include "arm_compute/runtime/CL/ICLSimpleFunction.h"
 
@@ -64,4 +64,4 @@
     static Status validate(const ITensorInfo *input, const ITensorInfo *output, float gamma = 1.0f, float beta = 0.0f, float epsilon = 1e-12f);
 };
 } // namespace arm_compute
-#endif /* __ARM_COMPUTE_CLINSTANCENORMALIZATIONLAYER_H__ */
+#endif /* ARM_COMPUTE_CLINSTANCENORMALIZATIONLAYER_H */