Add properties to support all Phy config
 PHY_MODE	(MII,GMII, RMII, RGMII) and in normal, PHY wo crystal (25Mhz),
 PHY wo crystal (50Mhz), No 125Mhz from PHY config.
Signed-off-by: NChristophe Roullier <christophe.roullier@st.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>