Input: gpio_keys - use <linux/gpio.h> instead of <asm/gpio.h>

The gpio keys driver should be using <linux/gpio.h> instead
of <asm/gpio.h>
Signed-off-by: Ben Dooks <ben@simtec.co.uk>
Signed-off-by: Simtec Linux Team <linux@simtec.co.uk>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>

drivers/input/keyboard/gpio_keys.c

@@ -23,8 +23,7 @@
 #include <linux/input.h>
 #include <linux/gpio_keys.h>
 #include <linux/workqueue.h>
-
-#include <asm/gpio.h>
+#include <linux/gpio.h>
 
 struct gpio_button_data {
 	struct gpio_keys_button *button;