A race between cfg80211 ap stop and wiphy system suspend can lead
to either DPM WD or serialization VDEV disconnect active command
timeout since scheduler thread gets suspended as part of wiphy
suspend and both cfg80211_disconnect and wiphy suspend/resume acquire
RTNL lock.
To address this race condition avoid ap stop when wiphy
suspend is already completed since scheduler thread gets suspended
as part of wiphy suspend and it can't process ap stop.
Change-Id: I5792b524a27326ca9e020600db2b82e16cc7ea96
CRs-Fixed: 3834305
2b69562ed6