The Teltonika RUTX50 mac-addresses on its wired interfaces are currently
random on every boot.
Setting the mac-addresses from device-tree using nvmem does not work, as
the vendor bootloader mangles the mtd partitions, removing the
nvmem-cells property.
To remedy the random mac-addresse, set the correct ones in preinit.
Signed-off-by: David Bauer <mail@david-bauer.net>
08c93512fe