drm/ttm: Fix memory type compatibility check
drm/ttm: Fix memory type compatibility check

From Thomas Hellstrom
04623382c8e829413c2b69f740a9455e2e764ab7 in ubuntu 3.8
59c8e66378fb78adbcd05f0d09783dde6fef282b in mainline linux

orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars,orumin/openbsd-efivars