net: dsa: lantiq: Switch to use dev_err_probe() helper

dev_err() can be replace with dev_err_probe() which will check if error
code is -EPROBE_DEFER.
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Reviewed-by: Vladimir Oltean <olteanv@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/lantiq_gswip.c

@@ -1989,11 +1989,9 @@ static int gswip_gphy_fw_probe(struct gswip_priv *priv,
 	}
 
 	gphy_fw->reset = of_reset_control_array_get_exclusive(gphy_fw_np);
-	if (IS_ERR(gphy_fw->reset)) {
-		if (PTR_ERR(gphy_fw->reset) != -EPROBE_DEFER)
-			dev_err(dev, "Failed to lookup gphy reset\n");
-		return PTR_ERR(gphy_fw->reset);
-	}
+	if (IS_ERR(gphy_fw->reset))
+		return dev_err_probe(dev, PTR_ERR(gphy_fw->reset),
+				     "Failed to lookup gphy reset\n");
 
 	return gswip_gphy_fw_load(priv, gphy_fw);
 }