RFR: 8295776: [JVMCI] Add x86 CPU flags for MPK and CET

[Matthias Neugschwandtner]

On Fri, 21 Oct 2022 16:18:17 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

> Changes look fine. I approve them.
> 
> The only confusion I have is platform name in title (yes, I know it is because Graal still uses AMD64 as platform name). May be better use x86 in title (I assume it is not 64-bit specific feature). I see these features are implemented in Intel's CPUs. Do AMD also have them?

Hi @vnkozlov , thank you for the review! I adjusted the PR title to use x86 instead of AMD64. As for the features themselves, yes, AMD CPUs have them as well.

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PR: https://git.openjdk.org/jdk/pull/10810