mvebu: Fix mac addresses for GL.iNet GL-MV1000
The original GL.iNet firmware has two different mac addresses in the
factory/art partition. The first one is for the WAN interface only and the
second one is for both lan0 and lan1.
But the original submission for OpenWrt didn't initialize the mac
addresses of the LAN ports for the DSA device at all. The ethernet mac
address was then used for all DSA ports.
Fixes: 050c24f05c85 ("mvebu: add support for GL.iNet GL-MV1000")
Signed-off-by: Sven Eckelmann <sven@narfation.org>