Add data for some nonlinear dmabufs to testdmabuf.c
It would be really useful to have a few examples of non-linear dmabufs in testdmabuf, to test our handling of such buffers.
For example, some things that intel gpus claim to support. What I'm looking for here is data files, e.g. for the two planes of a NV12:I915_FORMAT_MOD_Y_TILED dmabuf, so that I could reconstruct such a dmabuf in testdmabuf.c
I'm afraid I'm too clueless to record such things myself.
@rmader, would this be within your reach?