BRCMU_CHSPEC_D11AC_SB_MASK
val = ch->chspec & BRCMU_CHSPEC_D11AC_SB_MASK;
ch->sb = brcmu_maskget16(ch->chspec, BRCMU_CHSPEC_D11AC_SB_MASK,
ch->sb = brcmu_maskget16(ch->chspec, BRCMU_CHSPEC_D11AC_SB_MASK,
brcmu_maskset16(&ch->chspec, BRCMU_CHSPEC_D11AC_SB_MASK,