net80211: LinuxKPI: migrate HE defines to net80211, put correct values

Migrate most LinuxKPI 802.11 definitions for HE IEs to net80211.
During that process also properly define them as most of them only
had dummy values. Some of the definitions are sparse; that is, only
the bits used by drivers so far were listed and annotated with the
standards section.

There seems to be little point to mangle the names and have two copies
of all these bit field definitions. We can add "_S" (shift/mask)
variants to those we need in net80211 (if we do).

Sponsored by: The FreeBSD Foundation
Reviewed by: adrian
Differential Revision: https://reviews.freebsd.org/D50677

(cherry picked from commit 2ab7cbdc346e2a174a7bee4ce44c4f78b1ca093b)