MFC: Few codec such as Conexant CX20468-21 does have AC97_MIX_BEEP      control register, although the only usable part is the mute bit.
MFC: Few codec such as Conexant CX20468-21 does have AC97_MIX_BEEP
     control register, although the only usable part is the mute bit.

Noticed by:	Hans Petter Selasky <hselasky@c2i.net>

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase