Revert "drm/exynos: dp: Disable DP scrambling"

Revert "drm/exynos: dp: Disable DP scrambling"

People are reporting much worse glitching while using Chrome, seems
like this patch aggrevates it. Reverting until we know why.

This reverts commit e0547c7cc8eefd095e09fec19ab1b3f34adb3d38

Change-Id: I47c208b10f1e5441387cc3da6af7638a435458fc
Reviewed-on: https://gerrit.chromium.org/gerrit/28618
Reviewed-by: Anush Elangovan <anush@google.com>
Tested-by: Sean Paul <seanpaul@chromium.org>
Commit-Ready: Sean Paul <seanpaul@chromium.org>
Reviewed-by: Sean Paul <seanpaul@chromium.org>