power: regulator: replace dev_dbg() by dev_err() in regulator_post_bind()

To ease debugging, use dev_err() instead of dev_dbg() for
alerting when regulator has nonunique value.

Signed-off-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Quentin Schulz <quentin.schulz@cherry.de>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>

drivers/power/regulator/regulator-uclass.c

@@ -446,7 +446,7 @@ static int regulator_post_bind(struct udevice *dev)
 	}
 
 	if (!regulator_name_is_unique(dev, uc_pdata->name)) {
-		dev_dbg(dev, "'%s' has nonunique value: '%s\n",
+		dev_err(dev, "'%s' has nonunique value: '%s\n",
 			property, uc_pdata->name);
 		return -EINVAL;
 	}