Scan cmd still can be exist after scheduler thread is suspended
when host suspend, the scan cmd can't be removed from
serialization list by either complete or cancel any more since
both depends on scheduler thread, suspend thread blocked 30s to
wait scan cmd cleared.
Roam sync event from F/W can't be handled and Roam sync complete
can't be sent to F/W since scheduler thread suspended, then F/W
assert for roam sync cmd timeout.
After receive F/W down event, host will try SSR, but blocked by
unfinished suspend thread too.
Fix: suspend all components including scan before suspend
scheduler thread, make sure scan cmd is cleared and no new scan
is allowed any more before scheduler thread suspended.
Change-Id: I7a3badeedea018e4d92bbe8660692e42923852aa
CRs-Fixed: 2620650
5b0746560d