This patch adds stereo controls to revo cards by making the ak4xxx
driver mixers configurable from the card driver.
Signed-off-by: NJani Alinikula <janialinikula@gmail.com>
Signed-off-by: NTakashi Iwai <tiwai@suse.de>
Signed-off-by: NJaroslav Kysela <perex@suse.cz>