net: mediatek: simplify the return expression of mtk_gmac_sgmii_path_setup()

Simplify the return expression.
Signed-off-by: Zheng Yongjun <zhengyongjun3@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/mediatek/mtk_eth_path.c

@@ -241,17 +241,13 @@ static int mtk_eth_mux_setup(struct mtk_eth *eth, int path)
 
 int mtk_gmac_sgmii_path_setup(struct mtk_eth *eth, int mac_id)
 {
-	int err, path;
+	int path;
 
 	path = (mac_id == 0) ?  MTK_ETH_PATH_GMAC1_SGMII :
 				MTK_ETH_PATH_GMAC2_SGMII;
 
 	/* Setup proper MUXes along the path */
-	err = mtk_eth_mux_setup(eth, path);
-	if (err)
-		return err;
-
-	return 0;
+	return mtk_eth_mux_setup(eth, path);
 }
 
 int mtk_gmac_gephy_path_setup(struct mtk_eth *eth, int mac_id)