LinuxKPI: 802.11 header updates

While working on new and updates to drivers more structs, fields,
functions, .. were found, had to be shuffled around, ..
Some of these are (so far still dummy) functions or not properly
typed fields. The IEEE80211_HE_ constants are all still dummy.
This was msotly as a start to make new (out-of-tree) things compile.

Sponsored by: The FreeBSD Foundation (minor VHT/chan width bits)
MFC after: 1 week