qcacmn: Log time stamp of multi vdev restart response

Log the time stamp corresponding to the start of processing
of multi vdev restart response event.

CRs-Fixed: 3308918
Change-Id: Ia00923b3a1033097429d3856047a4b639408aab8

target_if/mlme/vdev_mgr/src/target_if_vdev_mgr_rx_ops.c

@@ -719,6 +719,7 @@ static int target_if_vdev_mgr_multi_vdev_restart_resp_handler(
 	}
 
 	qdf_mem_zero(&restart_resp, sizeof(restart_resp));
+	restart_resp.timestamp = qdf_get_log_timestamp();
 	if (wmi_extract_multi_vdev_restart_resp_event(wmi_handle, data,
 						      &restart_resp)) {
 		mlme_err("WMI extract failed");