This patch puts in place the machinery to attempt to reset the GPU. This
will be used when attempting to recover from a GPU hang.
Signed-off-by: NOwain G. Ainsworth <oga@openbsd.org>
Signed-off-by: NBen Gamari <bgamari.foss@gmail.com>
Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>