ARM: SAMSUNG: Fix on inclusion mach/gpio.h for Samsung SoCs

This patch fixes on inclusion <mach/gpio.h> to <linux/gpio.h>

Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
diff --git a/arch/arm/mach-s3c64xx/gpiolib.c b/arch/arm/mach-s3c64xx/gpiolib.c
index 60c929a..300dee4 100644
--- a/arch/arm/mach-s3c64xx/gpiolib.c
+++ b/arch/arm/mach-s3c64xx/gpiolib.c
@@ -15,9 +15,9 @@
 #include <linux/kernel.h>
 #include <linux/irq.h>
 #include <linux/io.h>
+#include <linux/gpio.h>
 
 #include <mach/map.h>
-#include <mach/gpio.h>
 
 #include <plat/gpio-core.h>
 #include <plat/gpio-cfg.h>