mac80211: Claim Fast Initial Link Setup (FILS) STA support

With the previous commits, initial FILS authentication/association
support is now functional in mac80211-based drivers for station role
(and FILS AP case is covered by user space in hostapd withotu requiring
mac80211 changes).

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>