Upgrade the argument of (*bss_info_changed) mac80211 ops function call
from 32 to 64 bit.
Add an extra argument to ieee80211_beacon_get_template().
Both changes are needed in order to keep other out-of-tree drivers in
synch and to move forward.
The driver changes were extracted from Linux wireless-testing
7b7090b4c6a906cc7c3e2a460335f705b93f4506 and
6e8912a503759bb8f1f01c5b761d0d45815fa6de.
Sponsored by: The FreBSD Foundation
MFC after: 1 week
467d3e2e8a