[jdk25u] RFR: 8361449: RISC-V: Code cleanup for native call

[duke]

On Fri, 1 Aug 2025 08:10:28 GMT, Dingli Zhang <dzhang at openjdk.org> wrote:

> Hi all,
> 
> This pull request contains a backport of commit [5edd5465](https://github.com/openjdk/jdk/commit/5edd546585d66f52c2e894ed212ee67945fe0785) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Dingli Zhang on 14 Jul 2025 and was reviewed by Fei Yang and Feilong Jiang.
> 
> Thanks!

@DingliZhang 
Your change (at version e07e5b46e988b3e0851eadd69b045a0c0df690a0) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/jdk25u/pull/57#issuecomment-3157086956