chell: Disable DSP on HDMI

Disable DSP on HDMI node.

BUG=chromium:636038
TEST=run audio_AudioBasicHDMI test on chell.

Change-Id: I49b86ee79b266be372e8dbddc381665c25bf1f86
Reviewed-on: https://chromium-review.googlesource.com/444627
Commit-Ready: Cheng-Yi Chiang <cychiang@chromium.org>
Tested-by: Cheng-Yi Chiang <cychiang@chromium.org>
Reviewed-by: Chinyue Chen <chinyue@chromium.org>
1 file changed