drm/amdgpu: Add tlb_cb for unlocked update

Flush TLB needs wait for GPU update fence done. MMU notify callback to
unmap range from GPUs uses unlocked GPU page table update, so add tlb_cb
to unlocked update fence to increase vm->tlb_seq.
Signed-off-by: Philip Yang <Philip.Yang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -927,7 +927,7 @@ int amdgpu_vm_bo_update_mapping(struct amdgpu_device *adev,
 
 	r = vm->update_funcs->commit(&params, fence);
 
-	if (!unlocked && (!(flags & AMDGPU_PTE_VALID) || params.table_freed)) {
+	if (!(flags & AMDGPU_PTE_VALID) || params.table_freed) {
 		tlb_cb->vm = vm;
 		if (!fence || !*fence ||
 		    dma_fence_add_callback(*fence, &tlb_cb->cb,