mwl_printtxbuf
static void mwl_printtxbuf(const struct mwl_txbuf *bf, u_int qnum, u_int ix);
mwl_printtxbuf(bf, txq->qnum, nreaped);
mwl_printtxbuf(bf, txq->qnum, ix);
mwl_printtxbuf(bf, txq->qnum, i);