BIT_SIFS_BK_EN
rtw_write8_clr(rtwdev, REG_TX_PTCL_CTRL + 1, BIT_SIFS_BK_EN >> 8);
rtw_write8_clr(rtwdev, REG_TX_PTCL_CTRL + 1, BIT_SIFS_BK_EN >> 8);
rtw_write8_clr(rtwdev, REG_TX_PTCL_CTRL + 1, BIT_SIFS_BK_EN >> 8);