iio: adc: ad7124: Benefit from devm_clk_get_enabled() to simplify

Make use of devm_clk_get_enabled() to replace some code that effectively
open codes this new function.
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20220808204740.307667-1-u.kleine-koenig@pengutronix.deSigned-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

drivers/iio/adc/ad7124.c

@@ -936,11 +936,6 @@ static void ad7124_reg_disable(void *r)
 	regulator_disable(r);
 }
 
-static void ad7124_clk_disable(void *c)
-{
-	clk_disable_unprepare(c);
-}
-
 static int ad7124_probe(struct spi_device *spi)
 {
 	const struct ad7124_chip_info *info;
@@ -993,18 +988,10 @@ static int ad7124_probe(struct spi_device *spi)
 			return ret;
 	}
 
-	st->mclk = devm_clk_get(&spi->dev, "mclk");
+	st->mclk = devm_clk_get_enabled(&spi->dev, "mclk");
 	if (IS_ERR(st->mclk))
 		return PTR_ERR(st->mclk);
 
-	ret = clk_prepare_enable(st->mclk);
-	if (ret < 0)
-		return ret;
-
-	ret = devm_add_action_or_reset(&spi->dev, ad7124_clk_disable, st->mclk);
-	if (ret)
-		return ret;
-
 	ret = ad7124_soft_reset(st);
 	if (ret < 0)
 		return ret;