video: exynos: dp: Remove sink control to D0

video: exynos: dp: Remove sink control to D0

Don't reset the sink power to D0. Removing this for three reasons:

1) It's not required in the SW link training documentation
2) The comment is incorrect, D0 is normal operation, not "power down"
3) It seems to change things in the link training that causes glitches

BUG=chrome-os-partner:11325
TEST=Tested on snow, glitching seems to be reduced

Change-Id: I3b87f953236b5597a4a10cbf3a1ea1d28fa8de91
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/27424