audio: mixer_paths: Rename mixer paths from hdmi to default audio out

Rename mixer path names to generic "default_" audio out instead
of "hdmi_" audio out. Naming the mixer paths with "hdmi_" prefix
was a shortsighted move and turned out the newer devboards come
with on-board speakers as well.

Change-Id: I21e24ecb6ead8a6c924058cc6f479ed77a215587
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
2 files changed