The Mikrotik RBwAPG-5HacT2HnD has only a single ethernet interface
(lan), and the vendor uses the base (label) MAC address for it.
Signed-off-by: Bjoern Dobe <bjoern@dobecom.de>
[commit title/message improvement]
Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>