RFR: 8361449: RISC-V: Code cleanup for native call [v2]

[Fei Yang]

On Mon, 14 Jul 2025 06:52:18 GMT, Feilong Jiang <fjiang at openjdk.org> wrote:

>> Correct,  it is partially synchronized with [JDK-8321509](https://bugs.openjdk.org/browse/JDK-8321509), mainly 4 and 6 [here](https://github.com/openjdk/jdk/pull/19796#issuecomment-2188094970). 
>> We do not really need `USE_TRAMPOLINE_STUB_FIX_OWNER` after [JDK-8343430](https://bugs.openjdk.org/browse/JDK-8343430).
>
>>  it is partially synchronized with [JDK-8321509](https://bugs.openjdk.org/browse/JDK-8321509), mainly 4 and 6 [here](https://github.com/openjdk/jdk/pull/19796#issuecomment-2188094970). 
> 
> As you mentioned in PR, this is just cleanup. Should we add this code in a separate PR?

I agree with @feilongjiang that we should keep this a cleanup change which shouldn't modify the original logic.

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PR Review Comment: https://git.openjdk.org/jdk/pull/26150#discussion_r2204016013