regulator: ad5398: Convert to devm_regulator_register

	struct ad5398_chip_info *chip;

	const struct ad5398_current_data_format *df =

			(struct ad5398_current_data_format *)id->driver_data;

	int ret;

	if (!init_data)

		return -EINVAL;

	chip->current_offset = df->current_offset;

	chip->current_mask = (chip->current_level - 1) << chip->current_offset;

	chip->rdev = regulator_register(&ad5398_reg, &config);

	chip->rdev = devm_regulator_register(&client->dev, &ad5398_reg,

					     &config);

	if (IS_ERR(chip->rdev)) {

		ret = PTR_ERR(chip->rdev);

		dev_err(&client->dev, "failed to register %s %s\n",

			id->name, ad5398_reg.name);

		goto err;

		return PTR_ERR(chip->rdev);

	}

	i2c_set_clientdata(client, chip);

	dev_dbg(&client->dev, "%s regulator driver is registered.\n", id->name);

	return 0;

err:

	return ret;

}

static int ad5398_remove(struct i2c_client *client)

{

	struct ad5398_chip_info *chip = i2c_get_clientdata(client);

	regulator_unregister(chip->rdev);

	return 0;

}

static struct i2c_driver ad5398_driver = {

	.probe = ad5398_probe,

	.remove = ad5398_remove,

	.driver		= {

		.name	= "ad5398",

	},