gpio: max730x: Use the right include

<linux/spi/max7301.h> despite the placement of the header, is
used by drivers/gpio/gpio-max730*.

The include needs struct gpio_chip and needs to include
<linux/gpio/driver.h> not the legacy <linux/gpio.h> include.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>

include/linux/spi/max7301.h

@@ -2,7 +2,7 @@
 #ifndef LINUX_SPI_MAX7301_H
 #define LINUX_SPI_MAX7301_H
 
-#include <linux/gpio.h>
+#include <linux/gpio/driver.h>
 
 /*
  * Some registers must be read back to modify.