ARM: shmobile: marzen-reference: Don't include legacy clock.h

The marzen-reference board file doesn't need the clock.h header, don't
include it.
Signed-off-by: NLaurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm/mach-shmobile/board-marzen-reference.c

@@ -26,7 +26,6 @@
 #include <asm/irq.h>
 #include <asm/mach/arch.h>
 
-#include "clock.h"
 #include "common.h"
 #include "irqs.h"
 #include "r8a7779.h"