prima: Return cached station info in case of deauth in progress

hdd_get_cached_station_remote is returning invalid sta info
if get station cmd is given just after del_station_cmd ie:before
disassociation happens in VosMc thread.

Check for deauth in progress while returning the chached station
info.

Change-Id: I4c7c4beddc3300760da7985c3d017d9cd652786c
CRs-Fixed: 2509258