qcacld-3.0: Revert "Move cp stats to scheduler thread from kwork"

This reverts change Id8134003e6f7a3e0368b20c496f650e0b7025b9e

Moving cp stats to scheduler thread is breaking the
synchronization in stats collection. Currently, when a get stats
command is issued from framework, host driver sends the same to
firmware and wait for both llstats and get_station related stats.
The expectation is to receive get_stats first and then llstats.
Host driver has a wait for the last llstats event to return the
stats to userspace. As the cp stats(get_station stats) are moved
to scheduler thread, the order of these events can't be ensured
as llstats are still running in kworker thread. llstats event gets
processed before cp stats mostly and stats are returned
immediately to framework. Framework may issue the get stats
command again and the same is sent to firmware, which may result
in synchronization issue in firmware as well.
Moving llstats also to scheduler thread may not be optimal as these
are aggressive and can be queried by framework multiple times with
a milliseconds gap.
So, move back the cp stats to kworker thread to maintain
synchronization.

Change-Id: I8dc518f0de37e7cc203cb1f6e67045d74b304d93
CRs-Fixed: 3002534

components/target_if/cp_stats/src/target_if_mc_cp_stats.c

@@ -1198,7 +1198,7 @@ target_if_register_big_data_event_handler(struct wmi_unified *wmi_handle)
 	return wmi_unified_register_event_handler(
 			    wmi_handle, wmi_vdev_send_big_data_p2_eventid,
 			    target_if_mc_cp_stats_big_data_stats_event_handler,
-			    WMI_RX_SERIALIZER_CTX);
+			    WMI_RX_WORK_CTX);
 }
 
 static void
@@ -1268,14 +1268,14 @@ target_if_mc_cp_stats_register_event_handler(struct wlan_objmgr_psoc *psoc)
 			wmi_handle,
 			wmi_update_stats_event_id,
 			target_if_mc_cp_stats_stats_event_handler,
-			WMI_RX_SERIALIZER_CTX);
+			WMI_RX_WORK_CTX);
 	if (QDF_IS_STATUS_ERROR(ret_val))
 		cp_stats_err("Failed to register stats event cb");
 
 	ret_val = wmi_unified_register_event_handler(wmi_handle,
 			    wmi_peer_stats_info_event_id,
 			    target_if_mc_cp_stats_peer_stats_info_event_handler,
-			    WMI_RX_SERIALIZER_CTX);
+			    WMI_RX_WORK_CTX);
 	if (QDF_IS_STATUS_ERROR(ret_val))
 		cp_stats_err("Failed to register peer stats info event cb");