drm/amdgpu: suspend KFD and KGD user queues for S0ix

drm/amdgpu: suspend KFD and KGD user queues for S0ix

commit 9272bb34b066993f5f468b219b4a26ba3f2b25a1 upstream.

We need to make sure the user queues are preempted so
GFX can enter gfxoff.

Reviewed-by: Mario Limonciello (AMD) <superm1@kernel.org>
Tested-by: David Perry <david.perry@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit f8b367e6fa1716cab7cc232b9e3dff29187fc99d)
Cc: stable@vger.kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>