So the reason China might win the trade war is that... they'll just start a world war? That seems a little out of scope. Yes, they might invade Taiwan. That would be rather worse for everyone than if they won/lost the race for CPU dominance.
International apathy is at an all time high, thanks to most countries dealing with internal political issues (which in most cases involve rigth wing groups and fake news)
Taiwan is an island. Sending a column of tanks there isn't something the PLA could just do overnight. They'd need to get a warship past Taiwan's naval and aerial defenses in the first place before they could even think of invading with tanks.
Yeah yeah, sure, it could happen. And if it did the last thing any of us would be concerned about is whether or not AMD shared innapropriate technology.
Just wait for the Americans to run out of cash to pay for the aircraft carriers around it...