net: phy: marvell-88x2222: set proper phydev->port

phydev->port was not set and always reported as PORT_TP.
Set phydev->port according to inserted SFP module.

Signed-off-by: Ivan Bornyakov <i.bornyakov@metrotek.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>