mac/cfg80211: reconfig sched scan after hw restart

Some implementations require that a sched scan
that is stopped due to hw restart, is restarted.
Sched scan reqeust parameters are kept and managed
to do that.
This also happens on suspend/resume without wowlan.

Signed-off-by: Barak Bercovitz <barak@wizery.com>
wlcore: no sched_scan_stopped on remove interface

Simulating a sched scan stopped from hw to userspace
is no longer valid on interface removal, since
sched scanning can be automatically restarted by mac80211

Signed-off-by: Barak Bercovitz <barak@wizery.com>