drm/i915: quirk backlight present on Macbook 4, 1
drm/i915: quirk backlight present on Macbook 4, 1

Unsurprisingly macbooks have backlights, just the VBT doesn't seem to
know it in this case.

Reported-and-tested-by: Daniel Nicoletti <8a3874f1532036e0431d4153b1a80e8c10736961@gmail.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=88325
Fixes: c675949ec58c ("drm/i915: do not setup backlight if not available according to VBT")
Cc: 4fbacc2fa0ffdbb11bf1ad6925b886ebd08dd15f@vger.kernel.org # v3.15+
Reviewed-by: Ander Conselvan de Oliveira <17227041d62225a8b18be8c9e33f1bc99023cd25@gmail.com>
Signed-off-by: Jani Nikula <ba783f3beccaedfda693f41a15407d612a629408@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1446716999-1796-1-git-send-email-ba783f3beccaedfda693f41a15407d612a629408@intel.com

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