qcacmn: VDEV MLME SM fixes

1) Pass EV_DOWN event to SUSPEND state

In Disconnection progress state event handler, on receiving
restart response, trigger EV_DOWN event to move to SUSPEND_DOWN
sub state

2) Replace return statements with status

Change-Id: Ieac0d158f79aad244a480eee24993ddc059b72f0
CRs-Fixed: 2307722
1 file changed