iio: accel: msa311: Use devm_regulator_get_enable()

This driver only turns the power on at probe and off via a custom
devm_add_action_or_reset() callback. The new devm_regulator_get_enable()
replaces this boilerplate code.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Cc: Dmitry Rokosov <DDRokosov@sberdevices.ru>
Reviewed-by: Dmitry Rokosov <ddrokosov@sberdevices.ru>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/20221016163409.320197-6-jic23@kernel.org

drivers/iio/accel/msa311.c

@@ -351,7 +351,6 @@ static const struct regmap_config msa311_regmap_config = {
  * @chip_name: Chip name in the format "msa311-%02x" % partid
  * @new_data_trig: Optional NEW_DATA interrupt driven trigger used
  *                 to notify external consumers a new sample is ready
- * @vdd: Optional external voltage regulator for the device power supply
  */
 struct msa311_priv {
 	struct regmap *regs;
@@ -362,7 +361,6 @@ struct msa311_priv {
 	char *chip_name;
 
 	struct iio_trigger *new_data_trig;
-	struct regulator *vdd;
 };
 
 enum msa311_si {
@@ -1146,11 +1144,6 @@ static void msa311_powerdown(void *msa311)
 	msa311_set_pwr_mode(msa311, MSA311_PWR_MODE_SUSPEND);
 }
 
-static void msa311_vdd_disable(void *vdd)
-{
-	regulator_disable(vdd);
-}
-
 static int msa311_probe(struct i2c_client *i2c)
 {
 	struct device *dev = &i2c->dev;
@@ -1173,19 +1166,9 @@ static int msa311_probe(struct i2c_client *i2c)
 
 	mutex_init(&msa311->lock);
 
-	msa311->vdd = devm_regulator_get(dev, "vdd");
-	if (IS_ERR(msa311->vdd))
-		return dev_err_probe(dev, PTR_ERR(msa311->vdd),
-				     "can't get vdd supply\n");
-
-	err = regulator_enable(msa311->vdd);
+	err = devm_regulator_get_enable(dev, "vdd");
 	if (err)
-		return dev_err_probe(dev, err, "can't enable vdd supply\n");
-
-	err = devm_add_action_or_reset(dev, msa311_vdd_disable, msa311->vdd);
-	if (err)
-		return dev_err_probe(dev, err,
-				     "can't add vdd disable action\n");
+		return dev_err_probe(dev, err, "can't get vdd supply\n");
 
 	err = msa311_check_partid(msa311);
 	if (err)