arm: vt8500: Fixup for missing gpio.h

mach/include/gpio.h was removed as part of the multiplatform-3.7
update. This patch removes the include from arch-vt8500/vt8500.c

Signed-off-by: Tony Prisk <linux@prisktech.co.nz>
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/mach-vt8500/vt8500.c

@@ -32,7 +32,6 @@
 #include <linux/of_platform.h>
 
 #include <mach/restart.h>
-#include <mach/gpio.h>
 
 #include "common.h"