mediatek: filogic: prevent faulty mac address assignment

mediatek: filogic: prevent faulty mac address assignment

The vendor U-Boot on the Cudy WR3000 assign random mac addresses on boot
and set the 'local-mac-address' property which prevents Openwrt from
assigning the correct address from evmem.

This patch removes the alias for ethernet0 so that U-Boot doesn't add
the property.

Related to: a55ab9e1343e ("mediatek: filogic: prevent faulty mac address assignment")
Fixes: https://github.com/openwrt/openwrt/issues/15587
Signed-off-by: Ondřej Niesner <ondra.niesner@seznam.cz>
Link: https://github.com/openwrt/openwrt/pull/17201
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>