R92C_TDECTRL
rtwn_pci_write_1(sc, R92C_TDECTRL + 1, boundary);
urtwn_write_1(sc, R92C_TDECTRL + 1, boundary);
reg = urtwn_read_4(sc, R92C_TDECTRL);
urtwn_write_4(sc, R92C_TDECTRL, reg);