hwmon: convert tmp102 to use devm_thermal_zone_of_sensor_register

This changes the driver to use the devm_ version
of thermal_zone_of_sensor_register and cleans
up the  local points and unregister calls.

Cc: Jean Delvare <jdelvare@suse.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: lm-sensors@lm-sensors.org
Cc: linux-kernel@vger.kernel.org
Acked-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Eduardo Valentin <edubezval@gmail.com>

drivers/hwmon/tmp102.c

@@ -53,7 +53,6 @@
 struct tmp102 {
 	struct i2c_client *client;
 	struct device *hwmon_dev;
-	struct thermal_zone_device *tz;
 	struct mutex lock;
 	u16 config_orig;
 	unsigned long last_update;
@@ -232,10 +231,8 @@ static int tmp102_probe(struct i2c_client *client,
 		goto fail_restore_config;
 	}
 	tmp102->hwmon_dev = hwmon_dev;
-	tmp102->tz = thermal_zone_of_sensor_register(hwmon_dev, 0, hwmon_dev,
-						     &tmp102_of_thermal_ops);
-	if (IS_ERR(tmp102->tz))
-		tmp102->tz = NULL;
+	devm_thermal_zone_of_sensor_register(hwmon_dev, 0, hwmon_dev,
+					     &tmp102_of_thermal_ops);
 
 	dev_info(dev, "initialized\n");
 
@@ -251,7 +248,6 @@ static int tmp102_remove(struct i2c_client *client)
 {
 	struct tmp102 *tmp102 = i2c_get_clientdata(client);
 
-	thermal_zone_of_sensor_unregister(tmp102->hwmon_dev, tmp102->tz);
 	hwmon_device_unregister(tmp102->hwmon_dev);
 
 	/* Stop monitoring if device was stopped originally */