RFR: 8364141: Remove LockingMode related code from x86 [v4]

[Fredrik Bredberg]

On Mon, 11 Aug 2025 05:05:28 GMT, Axel Boldt-Christmas <aboldtch at openjdk.org> wrote:

>> Fredrik Bredberg has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update three after review
>
> Looks good. 
> 
> As long as we take a final pass after all code changes has been performed and clean up the comments, variable-, parameter- and function-names. Would be nice to end with a consistent nomenclature, and remove all outdated terms, at least w.r.t. legacy locking.

@xmas92 
> As long as we take a final pass after all code changes has been performed and clean up the comments, variable-, parameter- and function-names. Would be nice to end with a consistent nomenclature, and remove all outdated terms, at least w.r.t. legacy locking.

That is my intention with this: [Cleanup after removing LockingMode related code](https://bugs.openjdk.org/browse/JDK-8365191)

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PR Comment: https://git.openjdk.org/jdk/pull/26552#issuecomment-3173828593