ARM: OMAP2+: Remove unnecesary include in GPMC driver

The GPMC driver includes arch/arm/mach-omap2/common.h but
does not use anything on that header so it can be removed.
Signed-off-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NTony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/gpmc.c

@@ -37,7 +37,6 @@
 #include <asm/mach-types.h>
 
 #include "soc.h"
-#include "common.h"
 #include "omap_device.h"
 #include "gpmc.h"
 #include "gpmc-nand.h"