drm/amdgpu/ttm: move to driver backend binding funcs

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200907204630.1406528-9-airlied@gmail.com
1 file changed