net: ethernet: mtk-star-emac: fix error return code in mtk_star_enable()

Fix to return a negative error code from the error handling
case instead of 0, as done elsewhere in this function.

Fixes: 8c7bd5a ("net: ethernet: mtk-star-emac: new driver")
Reported-by: Hulk Robot <[email protected]>
Signed-off-by: Zhang Changzhong <[email protected]>
Acked-by: Bartosz Golaszewski <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>

Author: Zhang Changzhong

drivers/net/ethernet/mediatek/mtk_star_emac.c

@@ -966,6 +966,7 @@ static int mtk_star_enable(struct net_device *ndev)
 				      mtk_star_adjust_link, 0, priv->phy_intf);
 	if (!priv->phydev) {
 		netdev_err(ndev, "failed to connect to PHY\n");
+		ret = -ENODEV;
 		goto err_free_irq;
 	}