R92C_TX_QUEUE_BCN
rtwn_setbits_1(sc, R92C_TXPAUSE, 0, R92C_TX_QUEUE_BCN);
rtwn_setbits_1(sc, R92C_TXPAUSE, R92C_TX_QUEUE_BCN, 0);
R92C_TX_QUEUE_HIGH | R92C_TX_QUEUE_BCN | 0x80) /* XXX */