[LDWG] Donation of the working iwx driver

Hey Chris and FF folks.

We at Future Crew ported the iwx driver from OpenBSD more than a year
ago and are using it with great success in our product. We'd be happy
to opensource it if you're interested. I tried contacting Alice and Ed
via Discord, but didn't get an informative response.

The driver is mostly on par with the OpenBSD version, but:
- lacks AMPDU-TX
- VHT160 is probably missing
- is at version 175, while upstream is 188 already

Our two conditions on the code donation are:
- Review comments should be addressed not by us. This is the main
reason why we did not opensource our work already. We have only one
src committer in our team, which is swamped by business tasks and only
does upstreaming in his free time.
- Our copyrights in the source should be preserved. The license itself
matches the OpenBSD version, of course.

Please let me know if LDWG would be interested in picking up our work,
or continue with current porting efforts.