hwmon: (gpio-fan) Convert to devm_hwmon_device_register_with_groups

This simplifies the code a bit and also ensures the attribute groups are
properly removed from sysfs when unload the module.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/gpio-fan.c

@@ -537,9 +537,10 @@ static int gpio_fan_probe(struct platform_device *pdev)
 	}
 
 	/* Make this driver part of hwmon class. */
-	fan_data->hwmon_dev = hwmon_device_register_with_groups(&pdev->dev,
-						"gpio_fan", fan_data,
-						gpio_fan_groups);
+	fan_data->hwmon_dev =
+		devm_hwmon_device_register_with_groups(&pdev->dev,
+						       "gpio_fan", fan_data,
+						       gpio_fan_groups);
 	if (IS_ERR(fan_data->hwmon_dev))
 		return PTR_ERR(fan_data->hwmon_dev);
 
@@ -548,15 +549,6 @@ static int gpio_fan_probe(struct platform_device *pdev)
 	return 0;
 }
 
-static int gpio_fan_remove(struct platform_device *pdev)
-{
-	struct gpio_fan_data *fan_data = platform_get_drvdata(pdev);
-
-	hwmon_device_unregister(fan_data->hwmon_dev);
-
-	return 0;
-}
-
 #ifdef CONFIG_PM_SLEEP
 static int gpio_fan_suspend(struct device *dev)
 {
@@ -588,7 +580,6 @@ static SIMPLE_DEV_PM_OPS(gpio_fan_pm, gpio_fan_suspend, gpio_fan_resume);
 
 static struct platform_driver gpio_fan_driver = {
 	.probe		= gpio_fan_probe,
-	.remove		= gpio_fan_remove,
 	.driver	= {
 		.name	= "gpio-fan",
 		.pm	= GPIO_FAN_PM,