leds: leds-gpio: Fix return value check in create_gpio_led()

In case of error, the function gpio_to_desc() returns NULL
pointer not ERR_PTR(). The IS_ERR() test in the return value
check should be replaced with NULL test.
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>

drivers/leds/leds-gpio.c

@@ -104,8 +104,8 @@ static int create_gpio_led(const struct gpio_led *template,
 			return ret;
 
 		led_dat->gpiod = gpio_to_desc(template->gpio);
-		if (IS_ERR(led_dat->gpiod))
-			return PTR_ERR(led_dat->gpiod);
+		if (!led_dat->gpiod)
+			return -EINVAL;
 	}
 
 	led_dat->cdev.name = template->name;