Only the DRM GPU scheduler, radeon and amdgpu where using them and they depend
on a non existing config option to actually emit some code.

v2: keep the signal path as is for now
Signed-off-by: Christian König <christian.koenig@amd.com>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20210818105443.1578-1-christian.koenig@amd.com