LinuxKPI: 802.11: enable WME support

Most of the WME code has been there disabled for months. One of the
reasons was that it lead to crashes early on. It is now understood
that the crashes are independent event and we can enable WME.
Update the code and deal with the calls from net80211 and adjust the
updates to when mac80211 drivers expect them, coherently put it under
LKPI_80211_WME and enable the define locally.

Sponsored by: The FreeBSD Foundation
MFC after: 3 days