[Intel-gfx] [PATCH 0/2] ddx/dri: Add support for hiz and separate stencil buffers

[Chad Versace]

These patches belong to my effort to enable hiz and separate stencil for IVB. 

Patch 1 belongs to dri2proto.
Patch 2 belongs to xf86-video-intel.

There is a related patch series on the mesa-dev list that uses this
functionality. See the thread with subject:
    i965: Implement hiz and separate stencil for window framebuffer
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1.7.5.2