drm/amdgpu: Introduce reset domain
Defined a reset_domain struct such that all the entities that go through reset together will be serialized one against another. Do it for both single device and XGMI hive cases. Signed-off-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com> Suggested-by: Daniel Vetter <daniel.vetter@ffwll.ch> Suggested-by: Christian König <ckoenig.leichtzumerken@gmail.com> Reviewed-by: Christian König <christian.koenig@amd.com> Link: https://www.spinics.net/lists/amd-gfx/msg74111.html
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