And even if quantum physics are essential to human brains, it's not clear that introducing dice transcends determinism into free will, as opposed to simply adding unpredictability. ("The physics made me do it" -> "the dice made me do it") Let's not forget, there's a significant amount of randomness in AIs as well ("temperature"). And sure, it's simulated algorithmic randomness; but does that imply, if we somehow wired every `rand()` call into radioactive atom decay, that means the AI "wakes up"?
And all that is besides the point: I don't see any reason to assume "intelligence" requires "free will". I'm entirely capable of conceiving, in the abstract, a being which is both intelligent, and deterministic. You still haven't given me a definition (or better yet, a test), to distinguish a "real intelligence" from unintelligent mechanism.