R92C_TDECTRL
__func__, urtwn_read_1(sc, R92C_TDECTRL + 2) &
usb_err = urtwn_write_1(sc, R92C_TDECTRL + 1, tx_boundary);
reg = urtwn_read_4(sc, R92C_TDECTRL);
urtwn_write_4(sc, R92C_TDECTRL, reg);