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

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

This reverts 'commit 3708d5e082c3 ("drm/i915: start adding dp mst audio")'
because it breaks MST multi-monitor setups on some platforms.

Fixes: 3708d5e082c3 ("drm/i915: start adding dp mst audio")
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97907
Signed-off-by: Dhinakaran Pandiyan <[email protected]>
Reported-by: Kim Lidström <[email protected]>
Cc: Libin Yang <[email protected]>
Cc: Lyude <[email protected]>
Cc: Jani Nikula <[email protected]>
Cc: Rodrigo Vivi <[email protected]>
Signed-off-by: Jani Nikula <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]