R12A_TX_SCALE
rtwn_bb_setbits(sc, R12A_TX_SCALE(i), R12A_TX_SCALE_SWING_M,
rtwn_bb_setbits(sc, R12A_TX_SCALE(0), 0x0f00, 0x0100);
rtwn_bb_setbits(sc, R12A_TX_SCALE(0), 0x0f00, 0);