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/GLES_COMPUTE/IGCKernel.h b/arm_compute/core/GLES_COMPUTE/IGCKernel.h
index 79d5793..7b2aad7 100644
--- a/arm_compute/core/GLES_COMPUTE/IGCKernel.h
+++ b/arm_compute/core/GLES_COMPUTE/IGCKernel.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017-2018 ARM Limited.
+ * Copyright (c) 2017-2019 ARM Limited.
  *
  * SPDX-License-Identifier: MIT
  *
@@ -21,8 +21,8 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  * SOFTWARE.
  */
-#ifndef __ARM_COMPUTE_IGCKERNEL_H__
-#define __ARM_COMPUTE_IGCKERNEL_H__
+#ifndef ARM_COMPUTE_IGCKERNEL_H
+#define ARM_COMPUTE_IGCKERNEL_H
 
 #include "arm_compute/core/GLES_COMPUTE/GCKernelLibrary.h"
 #include "arm_compute/core/GLES_COMPUTE/OpenGLES.h"
@@ -162,4 +162,4 @@
  */
 void enqueue(IGCKernel &kernel, const Window &window, const gles::NDRange &lws = gles::NDRange(1U, 1U, 1U));
 }
-#endif /*__ARM_COMPUTE_IGCKERNEL_H__ */
+#endif /*ARM_COMPUTE_IGCKERNEL_H */