drm/amdgpu/sdma6: re-emit unprocessed state on ring reset

Re-emit the unprocessed state after resetting the queue.

Reviewed-by: Jesse Zhang <Jesse.Zhang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>