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/pinctrl/pinctrl-uclass.c b/drivers/pinctrl/pinctrl-uclass.c
index 38ce2b5..ce2d5dd 100644
--- a/drivers/pinctrl/pinctrl-uclass.c
+++ b/drivers/pinctrl/pinctrl-uclass.c
@@ -222,9 +222,10 @@
  *
  * @dev: GPIO peripheral device
  * @offset: the GPIO pin offset from the GPIO controller
+ * @label: the GPIO pin label
  * @return: 0 on success, or negative error code on failure
  */
-int pinctrl_gpio_request(struct udevice *dev, unsigned offset)
+int pinctrl_gpio_request(struct udevice *dev, unsigned offset, const char *label)
 {
 	const struct pinctrl_ops *ops;
 	struct udevice *pctldev;