RME32 driver
The patch will change SNDRV_CTL_ELEM_IFACE_PCM to
SNDRV_CTL_ELEM_IFACE_MIXER for some mixer elements of rme32.
Signed-off-by: Martin Langer <martin-langer@gmx.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>