[PATCH 5/5] drm/i915: Force DPCD backlight mode on X1 Extreme 2nd Gen 4K AMOLED panel

[AceLan Kao]

I don't have this panel, but adding the first 3 OUI bytes to the
quirk, another platform which has DPCD aux brightness control works
well.

Tested-by: AceLan Kao <acelan.kao at canonical.com>

-- 
Chia-Lin Kao(AceLan)
http://blog.acelan.idv.tw/
E-Mail: acelan.kaoATcanonical.com (s/AT/@/)