RFR: 8367692: RISC-V: Align post call nop [v5]

[Fei Yang]

On Thu, 25 Sep 2025 12:37:36 GMT, Robbin Ehn <rehn at openjdk.org> wrote:

>> Yes, we need the relocation as we use that to patch the imms to the oopmaps.
>
> I changed to x86/pcc style and just use it as marker. No need to relocate location indepedent instructions.

Yes, OK.

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PR Review Comment: https://git.openjdk.org/jdk/pull/27467#discussion_r2379235468