R92C_SPS0_CTRL
rtwn_write_1(sc, R92C_SPS0_CTRL, 0x2b);
rtwn_write_1(sc, R92C_SPS0_CTRL, 0x23); /* ditto */
urtwn_write_1(sc, R92C_SPS0_CTRL, 0x2b);
urtwn_write_1(sc, R92C_SPS0_CTRL, 0x23);