r6040: invoke phy_{start,stop} when appropriate

Joe reported to me that right after a bring up of a r6040 interface
the ethtool output had no consistent output with respect to link duplex
and speed. Fix this by adding a missing phy_start call in r6040_up and
conversely a phy_stop call in r6040_down to properly initialize phy states.

Reported-by: Joe Chou <Joe.Chou@rdc.com.tw>
Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/rdc/r6040.c

@@ -470,6 +470,8 @@ static void r6040_down(struct net_device *dev)
 	iowrite16(adrp[0], ioaddr + MID_0L);
 	iowrite16(adrp[1], ioaddr + MID_0M);
 	iowrite16(adrp[2], ioaddr + MID_0H);
+
+	phy_stop(lp->phydev);
 }
 
 static int r6040_close(struct net_device *dev)
@@ -727,6 +729,8 @@ static int r6040_up(struct net_device *dev)
 	/* Initialize all MAC registers */
 	r6040_init_mac_regs(dev);
 
+	phy_start(lp->phydev);
+
 	return 0;
 }