ARM: s3c/gpio: 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/20250407-gpiochip-set-rv-arm-v1-4-9e4a914c7fd4@linaro.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>

Author: Bartosz Golaszewski

arch/arm/mach-s3c/gpio-samsung.c

@@ -430,8 +430,8 @@ static int samsung_gpiolib_4bit2_output(struct gpio_chip *chip,
 	return 0;
 }
 
-static void samsung_gpiolib_set(struct gpio_chip *chip,
-				unsigned offset, int value)
+static int samsung_gpiolib_set(struct gpio_chip *chip, unsigned int offset,
+			       int value)
 {
 	struct samsung_gpio_chip *ourchip = to_samsung_gpio(chip);
 	void __iomem *base = ourchip->base;
@@ -447,6 +447,8 @@ static void samsung_gpiolib_set(struct gpio_chip *chip,
 	__raw_writel(dat, base + 0x04);
 
 	samsung_gpio_unlock(ourchip, flags);
+
+	return 0;
 }
 
 static int samsung_gpiolib_get(struct gpio_chip *chip, unsigned offset)
@@ -515,7 +517,7 @@ static void __init samsung_gpiolib_add(struct samsung_gpio_chip *chip)
 	if (!gc->direction_output)
 		gc->direction_output = samsung_gpiolib_2bit_output;
 	if (!gc->set)
-		gc->set = samsung_gpiolib_set;
+		gc->set_rv = samsung_gpiolib_set;
 	if (!gc->get)
 		gc->get = samsung_gpiolib_get;