There are significant changes between NSS version 11.4.0.5 and 12.1 (12.0.5),
that it doesn't really make sense to use it with older firmware (i.e. using mesh releated
features).
This change will explicitly link building the proper driver and client
packages when FW 12.1 or 11.4 is selected, while also backporting
patches from 12.4.
To keep fork as closely synced with upstream, move NSS packages back
into repository. Not sure why they were moved out from my original fork.
* nss-firmware
* qca-nss-crypto
* qca-nss-cfi
Removed the following:
* mhz (already available in packages repo)
* qrtr (unecessary, and has been broken for years)
Also moved packages out of `qca` and back into root directory.
