drm/amdgpu: handle multi level PD updates V2

Update all levels of the page directory.

V2:
a. sub level pdes always are written to incorrect place.
b. sub levels need to update regardless of parent updates.

Signed-off-by: Christian König <christian.koenig@amd.com> (V1)
Reviewed-by: Alex Deucher <alexander.deucher@amd.com> (V1)
Signed-off-by: Chunming Zhou <David1.Zhou@amd.com> (V2)
Acked-by: Alex Deucher <alexander.deucher@amd.com> (V2)
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
index 6c8380d..abb4d27 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_vm.h
@@ -192,8 +192,8 @@ int amdgpu_vm_grab_id(struct amdgpu_vm *vm, struct amdgpu_ring *ring,
 		      struct amdgpu_job *job);
 int amdgpu_vm_flush(struct amdgpu_ring *ring, struct amdgpu_job *job);
 void amdgpu_vm_reset_id(struct amdgpu_device *adev, unsigned vm_id);
-int amdgpu_vm_update_page_directory(struct amdgpu_device *adev,
-				    struct amdgpu_vm *vm);
+int amdgpu_vm_update_directories(struct amdgpu_device *adev,
+				 struct amdgpu_vm *vm);
 int amdgpu_vm_clear_freed(struct amdgpu_device *adev,
 			  struct amdgpu_vm *vm,
 			  struct dma_fence **fence);