RFR: 8351839: RISC-V: Fix base offset calculation introduced in JDK-8347489

[Fei Yang]

On Wed, 12 Mar 2025 13:50:43 GMT, Hamlin Li <mli at openjdk.org> wrote:

> Looks good.

Thanks for having a quick look.

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PR Comment: https://git.openjdk.org/jdk/pull/24006#issuecomment-2719495749