Add missing PHY phandle into the DT, otherwise the stmmac code won't
detect the PHY correctly anymore.
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: NDinh Nguyen <dinguyen@opensource.altera.com>