chell: Disable DSP on both HDMI devices

There are two HDMI ports on Skylake platform.
Disable DSP on them.

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

Change-Id: Ifc6016b5ab28556ba96ea57938c847d3a618d1bf
Reviewed-on: https://chromium-review.googlesource.com/458618
Commit-Ready: Cheng-Yi Chiang <cychiang@chromium.org>
Tested-by: Cheng-Yi Chiang <cychiang@chromium.org>
Reviewed-by: Hsinyu Chao <hychao@chromium.org>
1 file changed