[FS#408] Archer C7 has incorrect default bssid addresses for wifi networks

[LEDE Bugs]

A new Flyspray task has been opened.  Details are below. 

User who did this - howl (howl) 

Attached to Project - LEDE Project
Summary - Archer C7 has incorrect default bssid addresses for wifi networks
Task Type - Bug Report
Category - Base system
Status - Unconfirmed
Assigned To - 
Operating System - All
Severity - Medium
Priority - Very Low
Reported Version - Trunk
Due in Version - Undecided
Due Date - Undecided
Details - Using LEDE Reboot SNAPSHOT r3022-7fb11c8.

This is at least for Archer C7 v2. The default bssids for the networks in my particular device are:

**:**:**:**:**:*D for the 2,4 GHz radio and
**:**:**:**:**:*C for the 5 GHz radio

In LEDE they result in

**:**:**:**:**:*C for the 2,4 GHz radio and
**:**:**:**:**:*B for the 5 GHz radio

The problem in LEDE is that the bssid set up for the 2,4 GHz is the one for 5 GHz and then the 5 GHz gets minus one. Don't know if it could be because the ethernet lan gets also **:**:**:**:**:*D and wlan1 can't have the same mac address as eth1. In the original firmware this seems to be possible, both ethernet lan and 2,4 GHz radio have the same mac/bssid.

Also, at least with the 2,4 GHz radio, when you set up another connection with the device as client, the bssid of the master one change *(+2):**:**:**:**:*C the second hex digit gets plus 2, the bssid that should get a second connection as ap, but in this case there is one ap one client connections. This one could be right and I have to test with another router to see if it happens because I didn't notice this before.

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=408