hwmon: (ds1621) Convert to use devm_hwmon_device_register_with_groups

Also use new macro __ATTRIBUTE_GROUPS to declare attribute groups.
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

drivers/hwmon/ds1621.c

@@ -354,11 +354,7 @@ static const struct attribute_group ds1621_group = {
 	.attrs = ds1621_attributes,
 	.is_visible = ds1621_attribute_visible
 };
-
-static const struct attribute_group *ds1621_groups[] = {
-	&ds1621_group,
-	NULL
-};
+__ATTRIBUTE_GROUPS(ds1621);
 
 static int ds1621_probe(struct i2c_client *client,
 			const struct i2c_device_id *id)
@@ -379,23 +375,12 @@ static int ds1621_probe(struct i2c_client *client,
 	/* Initialize the DS1621 chip */
 	ds1621_init_client(data, client);
 
-	hwmon_dev = hwmon_device_register_with_groups(&client->dev,
-						      client->name, data,
-						      ds1621_groups);
+	hwmon_dev = devm_hwmon_device_register_with_groups(&client->dev,
+							   client->name, data,
+							   ds1621_groups);
 	if (IS_ERR(hwmon_dev))
 		return PTR_ERR(hwmon_dev);
 
-	i2c_set_clientdata(client, hwmon_dev);
-
-	return 0;
-}
-
-static int ds1621_remove(struct i2c_client *client)
-{
-	struct device *hwmon_dev = i2c_get_clientdata(client);
-
-	hwmon_device_unregister(hwmon_dev);
-
 	return 0;
 }
 
@@ -416,7 +401,6 @@ static struct i2c_driver ds1621_driver = {
 		.name	= "ds1621",
 	},
 	.probe		= ds1621_probe,
-	.remove		= ds1621_remove,
 	.id_table	= ds1621_id,
 };