This one is different. x86 is something you can not sell to a foreign firm.
Only if US government thinks x86 is irrelevant and legacy technology US can now sell.
If Samsung does move to buy AMD, that would mean they already got pre-approval from US government and Intel would be the biggest hurdle.
In summary, whoever buys AMD, it should be ready to dump x86 (or spin off or something along that line....)