iio: adc: ad7476: simplify using devm_regulator_get_enable()

Drop open-coded pattern: 'devm_regulator_get(), regulator_enable(),
add_action_or_reset(regulator_disable)' and use the
devm_regulator_get_enable()

Signed-off-by: Matti Vaittinen <mazziesaccount@gmail.com>
Acked-by: Nuno Sá <nuno.sa@analog.com>
Link: https://lore.kernel.org/r/33070d66b9b976acac1cee5570facef9278b6b61.1660934107.git.mazziesaccount@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/ad7476.c

@@ -368,16 +368,7 @@ static int ad7476_probe(struct spi_device *spi)
 	}
 
 	if (st->chip_info->has_vdrive) {
-		reg = devm_regulator_get(&spi->dev, "vdrive");
-		if (IS_ERR(reg))
-			return PTR_ERR(reg);
-
-		ret = regulator_enable(reg);
-		if (ret)
-			return ret;
-
-		ret = devm_add_action_or_reset(&spi->dev, ad7476_reg_disable,
-					       reg);
+		ret = devm_regulator_get_enable(&spi->dev, "vdrive");
 		if (ret)
 			return ret;
 	}