Remove the tid from the software table (and bump down the in-use

counter) when the syncache doesn't want the driver to reply to an
incoming SYN.  This fixes a harmless bug where tids_in_use would
go out of sync with the hardware counter.

MFC after:	3 days

sys/dev/cxgbe/tom/t4_listen.c

@@ -1202,6 +1202,7 @@ do_pass_accept_req(struct sge_iq *iq, const struct rss_header *rss,
 		if (m)
 			m->m_pkthdr.rcvif = ifp;
 
+		remove_tid(sc, synqe->tid);
 		release_synqe(synqe);	/* about to exit function */
 		free(wr, M_CXGBE);
 		REJECT_PASS_ACCEPT();