pinctrl: stm32: 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>
Reviewed-by: Antonio Borneo <antonio.borneo@foss.st.com>
Link: https://lore.kernel.org/20250424-gpiochip-set-rv-pinctrl-part2-v1-5-504f91120b99@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: Bartosz Golaszewski

drivers/pinctrl/stm32/pinctrl-stm32.c

@@ -228,11 +228,14 @@ static int stm32_gpio_get(struct gpio_chip *chip, unsigned offset)
 	return !!(readl_relaxed(bank->base + STM32_GPIO_IDR) & BIT(offset));
 }
 
-static void stm32_gpio_set(struct gpio_chip *chip, unsigned offset, int value)
+static int stm32_gpio_set(struct gpio_chip *chip, unsigned int offset,
+			  int value)
 {
 	struct stm32_gpio_bank *bank = gpiochip_get_data(chip);
 
 	__stm32_gpio_set(bank, offset, value);
+
+	return 0;
 }
 
 static int stm32_gpio_direction_output(struct gpio_chip *chip,
@@ -308,7 +311,7 @@ static const struct gpio_chip stm32_gpio_template = {
 	.request		= stm32_gpio_request,
 	.free			= pinctrl_gpio_free,
 	.get			= stm32_gpio_get,
-	.set			= stm32_gpio_set,
+	.set_rv			= stm32_gpio_set,
 	.direction_input	= pinctrl_gpio_direction_input,
 	.direction_output	= stm32_gpio_direction_output,
 	.to_irq			= stm32_gpio_to_irq,