drm/i915: don't always do full mode sets when infoframes are enabled
drm/i915: don't always do full mode sets when infoframes are enabled

Partial revert of

commit 206645910b9796bff13fcdb67bdca166b724ba62
Author: Jesse Barnes <bc7add126c2dbb8382bf1c28ac262b9363a32706@virtuousgeek.org>
Date:   Wed Nov 5 14:26:09 2014 -0800

    drm/i915: check for audio and infoframe changes across mode sets v2

References: https://bugs.freedesktop.org/show_bug.cgi?id=86683
Signed-off-by: Jesse Barnes <bc7add126c2dbb8382bf1c28ac262b9363a32706@virtuousgeek.org>
Tested-by: Li Xu <18e6372aa975cecc6fa847e53e0a32bbfa07ec47@intel.com>
Signed-off-by: Jani Nikula <ba783f3beccaedfda693f41a15407d612a629408@intel.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs