qcacld-3.0: Dont touch the driver regstate in the driver

Previously the driver regstate(registration state) is changed in
the driver because of the misintepretation of the code in free_netdev.

Remove the driver regstate change which will help in false warning
from the  dev_put and device would be freed freely.

Change-Id: Iccb70dd2ecbf9c7dde390f9d728728e6f6af968f
CRs-Fixed: 3140423

core/hdd/src/wlan_hdd_mlo.c

@@ -137,7 +137,6 @@ void hdd_mlo_close_adapter(struct hdd_adapter *link_adapter, bool rtnl_held)
 		rtnl_unlock();
 
 	cfg80211_unregister_wdev(&link_adapter->wdev);
-	link_adapter->dev->reg_state = NETREG_UNREGISTERED;
 	free_netdev(link_adapter->dev);
 
 	if (rtnl_held)