qcacld-3.0: Use serialize context for thermal event

Use WMI_RX_SERIALIZER_CTX context for thermal event handler.
The default context is tasklet, it may cause issue when interact
with OS interface.

Change-Id: I349412c2afee9a081f0d38704541f77b5e4569f4
CRs-Fixed: 2824461

components/target_if/fw_offload/src/target_if_fwol.c

@@ -332,10 +332,11 @@ target_if_fwol_register_thermal_throttle_handler(struct wlan_objmgr_psoc *psoc)
 		target_if_debug("thermal mitigation offload not enabled");
 		return;
 	}
-	status = wmi_unified_register_event(
+	status = wmi_unified_register_event_handler(
 				get_wmi_unified_hdl_from_psoc(psoc),
 				wmi_tt_stats_event_id,
-				target_if_fwol_thermal_throttle_event_handler);
+				target_if_fwol_thermal_throttle_event_handler,
+				WMI_RX_SERIALIZER_CTX);
 	if (QDF_IS_STATUS_ERROR(status))
 		target_if_debug("Failed to register thermal stats event cb");
 }