VHT 160Mhz and nss related config.

[Johannes Berg]

> > This was recently added to the VHT capabilities in the spec, see
> > Table 9-250 in 802.11-2016.

> I don't have that spec...maybe you could post a patch that adds that
> flag and/or other fields to the appropriate header files?  I can
> attempt to add support to ath10k after that...

We're planning to, but it's not the most important thing on my list
right now ... I'll check where that's at now.

I can't even easily explain it, since it's really complicated.

johannes