gpio: ucb1400: Use proper header

The UCB1400 implements a GPIO driver so it needs to include the
<linux/gpio/driver.h> header, not the legacy <linux/gpio.h> header.
Compile tested on pxa_defconfig.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Bartosz Golaszewski <brgl@bgdev.pl>

drivers/gpio/gpio-ucb1400.c

@@ -7,6 +7,7 @@
 
 #include <linux/module.h>
 #include <linux/ucb1400.h>
+#include <linux/gpio/driver.h>
 
 static int ucb1400_gpio_dir_in(struct gpio_chip *gc, unsigned off)
 {

include/linux/ucb1400.h

@@ -23,7 +23,7 @@
 #include <sound/ac97_codec.h>
 #include <linux/mutex.h>
 #include <linux/platform_device.h>
-#include <linux/gpio.h>
+#include <linux/gpio/driver.h>
 
 /*
  * UCB1400 AC-link registers