pmdomain: mediatek: make use of dev_err_cast_probe()

Using dev_err_cast_probe() to simplify the code.

Signed-off-by: Hongbo Li <lihongbo22@huawei.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/20240828121230.3696315-1-lihongbo22@huawei.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>

Author: Hongbo Li

drivers/pmdomain/mediatek/mtk-pm-domains.c

@@ -398,12 +398,10 @@ generic_pm_domain *scpsys_add_one_domain(struct scpsys *scpsys, struct device_no
 		scpsys->dev->of_node = node;
 		pd->supply = devm_regulator_get(scpsys->dev, "domain");
 		scpsys->dev->of_node = root_node;
-		if (IS_ERR(pd->supply)) {
-			dev_err_probe(scpsys->dev, PTR_ERR(pd->supply),
+		if (IS_ERR(pd->supply))
+			return dev_err_cast_probe(scpsys->dev, pd->supply,
 				      "%pOF: failed to get power supply.\n",
 				      node);
-			return ERR_CAST(pd->supply);
-		}
 	}
 
 	pd->infracfg = syscon_regmap_lookup_by_phandle_optional(node, "mediatek,infracfg");