plat: marvell: Fix the wrong include protector

Fix the include protector to be in sync with file name
Signed-off-by: Konstantin Porotchkin <kostap@marvell.com>

include/plat/marvell/a8k/common/armada_common.h

@@ -5,8 +5,8 @@
  * https://spdx.org/licenses
  */
 
-#ifndef __A8K_COMMON_H__
-#define __A8K_COMMON_H__
+#ifndef __ARMADA_COMMON_H__
+#define __ARMADA_COMMON_H__
 
 #include <amb_adec.h>
 #include <io_win.h>