gpio: bcm-kona: use new 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.

Link: https://lore.kernel.org/r/20250310-gpiochip-set-conversion-v1-2-03798bb833eb@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Author: Bartosz Golaszewski

drivers/gpio/gpio-bcm-kona.c

@@ -149,7 +149,8 @@ static int bcm_kona_gpio_get_dir(struct gpio_chip *chip, unsigned gpio)
 	return val ? GPIO_LINE_DIRECTION_IN : GPIO_LINE_DIRECTION_OUT;
 }
 
-static void bcm_kona_gpio_set(struct gpio_chip *chip, unsigned gpio, int value)
+static int bcm_kona_gpio_set(struct gpio_chip *chip, unsigned int gpio,
+			     int value)
 {
 	struct bcm_kona_gpio *kona_gpio;
 	void __iomem *reg_base;
@@ -164,13 +165,15 @@ static void bcm_kona_gpio_set(struct gpio_chip *chip, unsigned gpio, int value)
 
 	/* this function only applies to output pin */
 	if (bcm_kona_gpio_get_dir(chip, gpio) == GPIO_LINE_DIRECTION_IN)
-		return;
+		return 0;
 
 	reg_offset = value ? GPIO_OUT_SET(bank_id) : GPIO_OUT_CLEAR(bank_id);
 
 	val = readl(reg_base + reg_offset);
 	val |= BIT(bit);
 	writel(val, reg_base + reg_offset);
+
+	return 0;
 }
 
 static int bcm_kona_gpio_get(struct gpio_chip *chip, unsigned gpio)
@@ -336,7 +339,7 @@ static const struct gpio_chip template_chip = {
 	.direction_input = bcm_kona_gpio_direction_input,
 	.get = bcm_kona_gpio_get,
 	.direction_output = bcm_kona_gpio_direction_output,
-	.set = bcm_kona_gpio_set,
+	.set_rv = bcm_kona_gpio_set,
 	.set_config = bcm_kona_gpio_set_config,
 	.to_irq = bcm_kona_gpio_to_irq,
 	.base = 0,