nl80211: Ignore deauth/disassoc event from old AP

nl80211: Ignore deauth/disassoc event from old AP

It looks like cfg80211 can deliver a deauth/disassoc event during some
roaming cases while we are already in progress with a new
authentication/association. This happens at least with FT protocol.
Avoid issues with such disconnection event resulting in core
wpa_supplicant stopping the new connection attempt by tracking
auth/assoc BSSID more carefully within driver_nl80211.c and filtering
out events that do not apply for the current AP.

Signed-hostap: Jouni Malinen <jouni@qca.qualcomm.com>