LinuxKPI: 802.11: bring in some HT code

Fix defines and structures to use proper types.

Bring in basic ni->sta synchronization, some channel width handling,
and overload the net80211 functions so that we can talk to
driver/firmware to setup parameters. We will likely not need one
or two of those but it is good for tracing currently.

Cover HT and bits of VHT code in LinuxKPI behind apropriate #ifdef
which are currently not enabled (like LKPI_80211_HW_CRYPTO) until
confirmed to work.
Last, IEEE80211_AMPDU_RX_START made some firmware unhappy.

This will allow others to work on it and test as well.

Sponsored by: The FreeBSD Foundation
MFC after: 10 days