drm/amdgpu: implement 2+1 PD support for Raven v3

Instead of falling back to 2 level and very limited address space use
2+1 PD support and 128TB + 512GB of virtual address space.

v2: cleanup defines, rebase on top of level enum
v3: fix inverted check in hardware setup

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-and-Tested-by: Chunming Zhou <david1.zhou@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 6b296e1..bbe06e0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -540,6 +540,7 @@ struct amdgpu_mc {
 	u64					private_aperture_end;
 	/* protects concurrent invalidation */
 	spinlock_t		invalidate_lock;
+	bool			translate_further;
 };
 
 /*