squash with add input

Change-Id: I79ba4b78683a582a12a0111dcd6f29bc1b8b257f
CRAS: iodev_list - Rename default dev to fallback.

Name the "default" device "fallback".  This is the device used when no
other devices are active.  Calling it fallback instead will allow for
the addition of a default device list which is the default set of
devices a stream attaches to.

Change-Id: If3a19fec26c5f1bbd008c5c734d09c6a2e6a745e
Signed-off-by: Dylan Reid <dgreid@chromium.org>
CRAS: iodev_list - Fix line > 80

Change-Id: I48f8939a2b9f1342f9310eb889c17ce14e6b7ba3
Signed-off-by: Dylan Reid <dgreid@chromium.org>
CRAS: audio_thread - remove devs_open()

It is no longer used.

Change-Id: I32b8626eb8ca134be2ab44606e8a62d199572d6e
Signed-off-by: Dylan Reid <dgreid@chromium.org>
CRAS: audio_thread - Remove buffer_frames and cb_thresh members

They are no longer used.

Change-Id: I88920fcb58d464ffd07ab1b5a05160e624bab446
Signed-off-by: Dylan Reid <dgreid@chromium.org>
CRAS: empty_iodev - Fix braces in else case.

No funcitonal change just style.

Change-Id: I5a7fedc7e7ef4fcf13ca43baa10bf0cd3da79c27
Signed-off-by: Dylan Reid <dgreid@chromium.org>
wip - dev switching.  Need to open dev when added to active list