qcacmn: Check return value for scheduler post msg

Check return value for scheduler post msg for disconnect message

Change-Id: Ib6ebbd5d043cf48410ff902ec6eacbaf3a7f3c2a
CRs-Fixed: 3614968

umac/mlo_mgr/src/wlan_mlo_mgr_sta.c

@@ -1141,7 +1141,7 @@ void mlo_handle_sta_link_connect_failure(struct wlan_objmgr_vdev *vdev,
 			msg.callback = ml_activate_disconnect_req_sched_cb;
 			msg.flush_callback =
 				ml_activate_disconnect_req_flush_cb;
-			mlo_post_disconnect_msg(&msg);
+			ret = mlo_post_disconnect_msg(&msg);
 			if (QDF_IS_STATUS_ERROR(ret)) {
 				wlan_objmgr_vdev_release_ref(
 						assoc_vdev,