ipq40xx: convert devolo Magic 2 WiFi next to DSA
Renamed the interfaces to match the other devices.
Name the interface connected to the builtin G.hn chip 'ghn'.
This might toggle at runtime while the G.hn chip is in the
bootloader.
Reviewed-by: Robert Marko <[email protected]>
Signed-off-by: Thomas Bong <[email protected]>