ALSA: snd-usb-6fire: add individual volume control for analog channels

Add a stereo volume control for every analog output pair 1/2, 3/4, 5/6.

Signed-off-by: Torsten Schenk <torsten.schenk@zoho.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
2 files changed