pinctrl: Add third argument label for pinctrl_gpio_request() function

This change allows to use pinctrl_gpio_request() function as a direct
pointer for dm_gpio_ops's .request callback.

Signed-off-by: Pali Rohár <pali@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/drivers/gpio/gpio-rcar.c b/drivers/gpio/gpio-rcar.c
index 76f4702..1388018 100644
--- a/drivers/gpio/gpio-rcar.c
+++ b/drivers/gpio/gpio-rcar.c
@@ -133,7 +133,7 @@
 static int rcar_gpio_request(struct udevice *dev, unsigned offset,
 			     const char *label)
 {
-	return pinctrl_gpio_request(dev, offset);
+	return pinctrl_gpio_request(dev, offset, label);
 }
 
 static int rcar_gpio_free(struct udevice *dev, unsigned offset)