pinctrl: pistachio: 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/20250424-gpiochip-set-rv-pinctrl-part2-v1-11-504f91120b99@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Author: Bartosz Golaszewski

drivers/pinctrl/pinctrl-pistachio.c

@@ -1186,12 +1186,14 @@ static int pistachio_gpio_get(struct gpio_chip *chip, unsigned offset)
 	return !!(gpio_readl(bank, reg) & BIT(offset));
 }
 
-static void pistachio_gpio_set(struct gpio_chip *chip, unsigned offset,
-			       int value)
+static int pistachio_gpio_set(struct gpio_chip *chip, unsigned int offset,
+			      int value)
 {
 	struct pistachio_gpio_bank *bank = gpiochip_get_data(chip);
 
 	gpio_mask_writel(bank, GPIO_OUTPUT, offset, !!value);
+
+	return 0;
 }
 
 static int pistachio_gpio_direction_input(struct gpio_chip *chip,
@@ -1326,7 +1328,7 @@ static void pistachio_gpio_irq_handler(struct irq_desc *desc)
 			.direction_input = pistachio_gpio_direction_input, \
 			.direction_output = pistachio_gpio_direction_output, \
 			.get = pistachio_gpio_get,			\
-			.set = pistachio_gpio_set,			\
+			.set_rv = pistachio_gpio_set,			\
 			.base = _pin_base,				\
 			.ngpio = _npins,				\
 		},							\