drm/amdgpu/kiq: add no_scheduler flag to KIQ
We don't want a GPU scheduler for this ring.
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>