qcacld-3.0: Lock leak in function policy_mgr_is_restart_sap_required
In case of failure policy_mgr_is_restart_sap_required
returns without releasing the lock. This leads to lock leak.
Fix is to release the lock before return in case of failure.
Change-Id: I032a6902de1bd0c8f87b660aac98a2fb08dd3f10
CRs-Fixed: 3269538