REG_PKT_BE_BK_LIFE_TIME
rtl8xxxu_write16(priv, REG_PKT_BE_BK_LIFE_TIME, 0x0400); /* unit: 256us. 256ms */
rtl_write_word(rtlpriv, REG_PKT_BE_BK_LIFE_TIME, 0x0400);
rtw_write16(padapter, REG_PKT_BE_BK_LIFE_TIME, 0x0400); /* unit: 256us. 256ms */