ZYD_MAC_MAN_RATE
(void)zyd_write32(sc, ZYD_MAC_MAN_RATE, 0x000f);
(void)zyd_write32(sc, ZYD_MAC_MAN_RATE, 0x1500);
(void)zyd_write32(sc, ZYD_MAC_MAN_RATE, 0x150f);