RFR: 8289743: AArch64: Clean up patching logic

[Andrew Haley]

On Fri, 8 Jul 2022 06:56:37 GMT, David Holmes <dholmes at openjdk.org> wrote:

> To be on the safe side I'm putting this through our internal testing. Please hold off integrating until I give it the green light. Thanks.

OK, thanks. There's no hurry, and no need to get this one into the next release.

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PR: https://git.openjdk.org/jdk/pull/9398