net: fec: fix regression in link change accounting

A link-down isn't properly saved in the FEC state, so we wouldn't restart the
FEC after a repeated link-up.

Regression was introduced with commit
d97e7497 "net: fec: restart the FEC when PHY speed changes"
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/fec.c

@@ -1002,6 +1002,7 @@ static void fec_enet_adjust_link(struct net_device *ndev)
 	} else {
 		if (fep->link) {
 			fec_stop(ndev);
+			fep->link = phy_dev->link;
 			status_change = 1;
 		}
 	}