sound: oxygen: better defaults for upmixing control

On card models with two-channel outputs, the base driver can
automatically disable the upmixing control so that the model
drivers do not need to do this.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
3 files changed