The Atheros AR8035 PHY can be autodetected but can't use interrupt
support provided on this board. Define MDIO bus and the PHY node to make
it work properly.
Reviewed-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NOleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>