drm/amdgpu/gfx9: remove unused sdma headers

All of the sdma stuff these were used for moves to
the sdma code, so remove them.

Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2020-01-08 17:33:51 -05:00
commit d44394a9e1