ar71xx: TL-WR1043N/ND v2: Fix MAC address of WMAC

ar71xx: TL-WR1043N/ND v2: Fix MAC address of WMAC

This sets the MAC address of the WLAN interface to the "official" primary MAC
address (the one on the label under the devices, and the one used with the stock
firmware). The MAC address used so far (primary-1) isn't even used at all with
the stock firmware, which sets (primary) on LAN and WLAN and (primary+1) on the
WAN interface (like OpenWrt does with this patch).

Signed-off-by: Matthias Schiffer <mschiffer@universe-factory.net>
Backport of r42193

SVN-Revision: 42367