wifi: cfg80211: fix locking in regulatory disconnect

This should use wiphy_lock() now instead of requiring the
RTNL, since __cfg80211_leave() via cfg80211_leave() is now
requiring that lock to be held.

Fixes: a05829a7 ("cfg80211: avoid holding the RTNL when calling the driver")
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

net/wireless/reg.c

@@ -2440,11 +2440,11 @@ static void reg_leave_invalid_chans(struct wiphy *wiphy)
 	struct wireless_dev *wdev;
 	struct cfg80211_registered_device *rdev = wiphy_to_rdev(wiphy);
 
-	ASSERT_RTNL();
-
+	wiphy_lock(wiphy);
 	list_for_each_entry(wdev, &rdev->wiphy.wdev_list, list)
 		if (!reg_wdev_chan_valid(wiphy, wdev))
 			cfg80211_leave(rdev, wdev);
+	wiphy_unlock(wiphy);
 }
 
 static void reg_check_chans_work(struct work_struct *work)