iio:magnetometer:mbc150: Make bmc150_magn_remove() return void

bmc150_magn_remove() always returns zero. Make it return no value which
makes it easier to see in the callers that there is no error to handle.

Also the return value of i2c driver remove callbacks is ignored anyway.
This prepares making i2c remove callbacks return void, too.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20220514133250.307955-1-u.kleine-koenig@pengutronix.deSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/magnetometer/bmc150_magn.c

@@ -985,7 +985,7 @@ int bmc150_magn_probe(struct device *dev, struct regmap *regmap,
 }
 EXPORT_SYMBOL_NS(bmc150_magn_probe, IIO_BMC150_MAGN);
 
-int bmc150_magn_remove(struct device *dev)
+void bmc150_magn_remove(struct device *dev)
 {
 	struct iio_dev *indio_dev = dev_get_drvdata(dev);
 	struct bmc150_magn_data *data = iio_priv(indio_dev);
@@ -1008,7 +1008,6 @@ int bmc150_magn_remove(struct device *dev)
 	mutex_unlock(&data->mutex);
 
 	regulator_bulk_disable(ARRAY_SIZE(data->regulators), data->regulators);
-	return 0;
 }
 EXPORT_SYMBOL_NS(bmc150_magn_remove, IIO_BMC150_MAGN);
 

drivers/iio/magnetometer/bmc150_magn.h

@@ -7,6 +7,6 @@ extern const struct dev_pm_ops bmc150_magn_pm_ops;
 
 int bmc150_magn_probe(struct device *dev, struct regmap *regmap, int irq,
 		      const char *name);
-int bmc150_magn_remove(struct device *dev);
+void bmc150_magn_remove(struct device *dev);
 
 #endif /* _BMC150_MAGN_H_ */

drivers/iio/magnetometer/bmc150_magn_i2c.c

@@ -36,7 +36,9 @@ static int bmc150_magn_i2c_probe(struct i2c_client *client,
 
 static int bmc150_magn_i2c_remove(struct i2c_client *client)
 {
-	return bmc150_magn_remove(&client->dev);
+	bmc150_magn_remove(&client->dev);
+
+	return 0;
 }
 
 static const struct acpi_device_id bmc150_magn_acpi_match[] = {