wifi: cfg80211: hold wiphy lock in auto-disconnect

[ Upstream commit e9da6df7 ]

Most code paths in cfg80211 already hold the wiphy lock,
mostly by virtue of being called from nl80211, so make
the auto-disconnect worker also hold it, aligning the
locking promises between different parts of cfg80211.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Stable-dep-of: 37c20b2e ("wifi: cfg80211: fix cqm_config access race")
Signed-off-by: Sasha Levin <sashal@kernel.org>