LinuxKPI: 802.11: add futher defines to ieee80211.h and nl80211.h

Upstream new defines, enum values, etc. for coming driver updates which
are non-conflicting with the current state.

The only notable change is the rename of the enum ieee80211_ap_reg_power
but the enum name had not been used so far by any driver in the tree
(only in mac80211.h) but an updated version of ath11k does use it so we
need to correct our initial naming.

Sponsored by: The FreeBSD Foundation
MFC after: 3 days