This was buggy because when we had to wait for entities which were
killed as well we would just deadlock.

Instead move all the dependency handling into the callbacks so that
will all happen asynchronously.
Signed-off-by: NChristian König <christian.koenig@amd.com>
Reviewed-by: NLuben Tuikov <luben.tuikov@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221014084641.128280-13-christian.koenig@amd.com