This is used by radeon and freedreno and will be used
by amdgpu. I looked at switching to libdrm_lists.h,
but it's pretty horrible. E.g., DRMLISTFOREACHENTRYSAFE.
v2: remove missed list.h from tests/radeon/Makefile.am
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>