patch for 10.x [1/2]

[Masachika ISHIZUKA]

>>> The i915 update is now in HEAD as of r296548:
> 
>   It is worked with 10.3-RC2 on my dell xps12.

  I missed drm_mem_util.h patch.
  Corrected and updated(r297231) patch is uploaded as follow.

http://www17.plala.or.jp/ish-org/i915-patch-r297231-for-10.x.tar.xz
-- 
Masachika ISHIZUKA