R12A_ARFR_2G
rtwn_write_4(sc, R12A_ARFR_2G(0), 0x00000015);
rtwn_write_4(sc, R12A_ARFR_2G(0) + 4, 0x003ff000);
rtwn_write_4(sc, R12A_ARFR_2G(1), 0x00000015);
rtwn_write_4(sc, R12A_ARFR_2G(1) + 4, 0xffcff000);