gpio: convert remaining users to gpiochip_add_data()

For completion, sweep the floor from all gpiochip_add() usage so
we can remove that function and get rid of the function wrapper
gpiochip_add().

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-ks8695.c

@@ -234,7 +234,7 @@ static struct gpio_chip ks8695_gpio_chip = {
 /* Register the GPIOs */
 void ks8695_register_gpios(void)
 {
-	if (gpiochip_add(&ks8695_gpio_chip))
+	if (gpiochip_add_data(&ks8695_gpio_chip, NULL))
 		printk(KERN_ERR "Unable to register core GPIOs\n");
 }