drm/i915: Ignore VBT backlight presence check on Acer C720 (4005U)
drm/i915: Ignore VBT backlight presence check on Acer C720 (4005U)

commit c675949ec58ca50d5a3ae3c757892f1560f6e896
Author: Jani Nikula <ba783f3beccaedfda693f41a15407d612a629408@intel.com>
Date:   Wed Apr 9 11:31:37 2014 +0300

    drm/i915: do not setup backlight if not available according to VBT

prevents backlight setup on the Acer C720 (Core i3 4005U CPU), which has a
misconfigured VBT. Apply quirk to ignore the VBT backlight presence check
during backlight setup.

Signed-off-by: Scot Doyle <77ffdcc5cb1c47496c6428eff4b1a5e15bff62f3@scotdoyle.com>
Tested-by: Tyler Cleveland <4013475d42a1cab9f377fc35d806a0e9a131521f@openmailbox.org>
Cc: Jani Nikula <ba783f3beccaedfda693f41a15407d612a629408@intel.com>
Cc: Daniel Vetter <c1b6782c4af8f0673da8923a0702a1832e5940f4@ffwll.ch>
Cc: 4fbacc2fa0ffdbb11bf1ad6925b886ebd08dd15f@vger.kernel.org (3.15+)
Signed-off-by: Jani Nikula <ba783f3beccaedfda693f41a15407d612a629408@intel.com>

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