tools/intel_error_decode: convert over to libdrm decoder

Note that a per-ring error decode state would make more sense - this
way we could better decode the ring head and tail. But our current
head tracking is already lame (we need the kernel to also dump the
ringbuffer head/tail first, not just acthd), so I didn't bother.

Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
2 files changed