gpio: max730x: Include the right header

This is a driver so only include <linux/gpio/driver.h>.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/gpio/gpio-max730x.c b/drivers/gpio/gpio-max730x.c
index 946d091..198a36b 100644
--- a/drivers/gpio/gpio-max730x.c
+++ b/drivers/gpio/gpio-max730x.c
@@ -35,7 +35,7 @@
 #include <linux/platform_device.h>
 #include <linux/mutex.h>
 #include <linux/spi/max7301.h>
-#include <linux/gpio.h>
+#include <linux/gpio/driver.h>
 #include <linux/slab.h>
 
 /*