It's not that at all. It's abuse of dominance, not the dominance itself that's the problem.

They're using a dominant position in one market to push services in an unrelated market. That's anti-trust 101. And they punish suppliers who don't tow the line.

This is exactly the same as the MS anti-trust case. Swap IE for Google Web Services (Search/Maps/Chrome) and swap Android for Windows.

If ARM started forcing phone companies using their CPUs to only sell to AT&T, that's your analogy. As it is, because ARM don't force unrelated services or products on their customers, it's not analogous.