There is no need to give the mdio bus a family dependent name.
Name the bus similar to the SerDes mdio bus.
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/21274
Signed-off-by: Robert Marko <robimarko@gmail.com>