qcacld-3.0: Fix bad SSR protection in wakelock stats handler
It was observed that it was taking an excessive time for Wi-Fi to
unload from the UI. Logs showed that unload was waiting for an
external thread to exit, giving the entry point as
wlan_hdd_cfg80211_get_wakelock_stats(). Analysis of that function
showed it is incorrectly using the SSR protection functions. Update
that function to correctly "unprotect" on exit.
Change-Id: Ic7476be656a7b0c8d09748c1e546fd1a33ce33c5
CRs-Fixed: 1077214