qcacld-3.0: Fix possible spinlock acquire after destroy

qdf_conc_list_lock from policy manager is destroyed as part of
idle shutdown, later when FW down indication comes it is trying
to acquire as part of ucfg_dp_bus_bw_compute_timer_stop.

So call ucfg_dp_bus_bw_compute_timer_stop function in
hdd_soc_recovery_cleanup after checking driver status.

Change-Id: I27164a4b11467aee6c925225fe33d4fdbe0b4082
CRs-Fixed: 3689606