RFR: 8289743: AArch64: Clean up patching logic [v13]

[Andrew Haley]

On Fri, 22 Jul 2022 08:55:27 GMT, Dean Long <dlong at openjdk.org> wrote:

> > I've reproduced the problem and I'm now looking at the cleanest way to fix it.
> 
> You can check out the patch I uploaded to JDK-8290780 and see if I'm on the right track on not :-)

Yes, it's much the same. I fixed the verification logic too.

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