REG_TXF4
rtw_write32_set(rtwdev, REG_TXF4, BIT(20));
rtw_write32_mask(rtwdev, REG_TXF4, MASKLWORD, 0xf3d7);
rtw_write32_mask(rtwdev, REG_TXF4, MASKLWORD, 0xc8b2);
rtw_write32_clr(rtwdev, REG_TXF4, BIT(20));