ASoC: meson: Use the devm_clk_get_optional() helper

Use devm_clk_get_optional() instead of hand writing it.
This saves some loC and improves the semantic.
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Reviewed-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/8dab942d6ce47657a9c038295959be80bb2ee09e.1679834598.git.christophe.jaillet@wanadoo.frSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/meson/axg-tdm-interface.c

@@ -496,7 +496,7 @@ static int axg_tdm_iface_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct snd_soc_dai_driver *dai_drv;
 	struct axg_tdm_iface *iface;
-	int ret, i;
+	int i;
 
 	iface = devm_kzalloc(dev, sizeof(*iface), GFP_KERNEL);
 	if (!iface)
@@ -533,14 +533,9 @@ static int axg_tdm_iface_probe(struct platform_device *pdev)
 	 * At this point, ignore the error if mclk is missing. We'll
 	 * throw an error if the cpu dai is master and mclk is missing
 	 */
-	iface->mclk = devm_clk_get(dev, "mclk");
-	if (IS_ERR(iface->mclk)) {
-		ret = PTR_ERR(iface->mclk);
-		if (ret == -ENOENT)
-			iface->mclk = NULL;
-		else
-			return dev_err_probe(dev, ret, "failed to get mclk\n");
-	}
+	iface->mclk = devm_clk_get_optional(dev, "mclk");
+	if (IS_ERR(iface->mclk))
+		return dev_err_probe(dev, PTR_ERR(iface->mclk), "failed to get mclk\n");
 
 	return devm_snd_soc_register_component(dev,
 					&axg_tdm_iface_component_drv, dai_drv,