pinctrl: bcm: iproc-gpio: use new GPIO line value setter callbacks

struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/20250425-gpiochip-set-rv-pinctrl-bcm-v1-2-6b8883d79b66@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: Bartosz Golaszewski

drivers/pinctrl/bcm/pinctrl-iproc-gpio.c

@@ -390,7 +390,7 @@ static int iproc_gpio_get_direction(struct gpio_chip *gc, unsigned int gpio)
 	return GPIO_LINE_DIRECTION_IN;
 }
 
-static void iproc_gpio_set(struct gpio_chip *gc, unsigned gpio, int val)
+static int iproc_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
 {
 	struct iproc_gpio *chip = gpiochip_get_data(gc);
 	unsigned long flags;
@@ -400,6 +400,8 @@ static void iproc_gpio_set(struct gpio_chip *gc, unsigned gpio, int val)
 	raw_spin_unlock_irqrestore(&chip->lock, flags);
 
 	dev_dbg(chip->dev, "gpio:%u set, value:%d\n", gpio, val);
+
+	return 0;
 }
 
 static int iproc_gpio_get(struct gpio_chip *gc, unsigned gpio)
@@ -863,7 +865,7 @@ static int iproc_gpio_probe(struct platform_device *pdev)
 	gc->direction_input = iproc_gpio_direction_input;
 	gc->direction_output = iproc_gpio_direction_output;
 	gc->get_direction = iproc_gpio_get_direction;
-	gc->set = iproc_gpio_set;
+	gc->set_rv = iproc_gpio_set;
 	gc->get = iproc_gpio_get;
 
 	chip->pinmux_is_supported = of_property_read_bool(dev->of_node,