Revert "drm/i915: start adding dp mst audio"

Revert "drm/i915: start adding dp mst audio"

Right now MST audio is causing too many kernel panics to really keep
around in the kernel. On top of that, even after fixing said panics it's
still basically non-functional (at least on all the setups I've tested
it on). Revert until we have a proper solution for this.

This reverts commit aef01c18d5a7dc93a2480113ef3073829b9af36f.

Signed-off-by: Lyude <cpaul@redhat.com>
Fixes: aef01c18d5a7 ("drm/i915: start adding dp mst audio")
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1462287692-28570-1-git-send-email-cpaul@redhat.com
(cherry picked from commit 5a8f97ea04c98201deeb973c3f711c3c156115e9)
Signed-off-by: Jani Nikula <jani.nikula@intel.com>