The format of the view itself and of the view's image may differ.
Moreover, if the view's format has no depth aspect but the image's
format does, we must not program the depth buffer. Ditto for stencil.
With all the previous commits in place, we can now drop in support for
multiple platforms. First up is gen7 (Ivybridge).
Signed-off-by: Kristian Høgsberg Kristensen <kristian.h.kristensen@intel.com>
