drm/amdkfd: use unmap all queues for poison consumption

Replace reset queue for specific PASID with unmap all queues, reset
queue could break CP scheduler.

Signed-off-by: Tao Zhou <tao.zhou1@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>