VHT 160Mhz and nss related config.

[Ben Greear]

So, it appears that the ath10k QCA9984 4x4 160Mhz chip can do 4x4 MIMO at VHT80, but
it can do only 2x2 MIMO at VHT160/80+80.

When configuring a peer, we need to tell the firmware the number of spatial streams
of the peer at VHT160 and at VHT80 and lower.  They are not the same value.

I cannot think of any standard way to get this information based on VHT capabilities
and such.  Currently, one could just assume VHT160 NSS is 1/2 of the VHT80 NSS,
but that is unlikely to be true for all vendors.

Any ideas?

Thanks,
Ben

-- 
Ben Greear <greearb at candelatech.com>
Candela Technologies Inc  http://www.candelatech.com