drm/amdgpu: fix new PD update code for Vega10 v2

We need to refer to the parent instead of the root BO for multi
level page tables on Vega10. Also don't set the PDE_PTE bit.

v2: Don't set the PDE_PTE bit either.
Signed-off-by: NChristian König <christian.koenig@amd.com>
Reviewed-and-Tested-by: NRoger He <Hongbo.He@amd.com>
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_vm.c

@@ -309,7 +309,7 @@ static int amdgpu_vm_alloc_levels(struct amdgpu_device *adev,
 			/* Keep a reference to the root directory to avoid
 			* freeing them up in the wrong order.
 			*/
-			pt->parent = amdgpu_bo_ref(vm->root.base.bo);
+			pt->parent = amdgpu_bo_ref(parent->base.bo);
 
 			entry->base.vm = vm;
 			entry->base.bo = pt;
@@ -317,7 +317,7 @@ static int amdgpu_vm_alloc_levels(struct amdgpu_device *adev,
 			spin_lock(&vm->status_lock);
 			list_add(&entry->base.vm_status, &vm->relocated);
 			spin_unlock(&vm->status_lock);
-			entry->addr = ~0ULL;
+			entry->addr = 0;
 		}
 
 		if (level < adev->vm_manager.num_level) {