RFR: 8345669: RISC-V: fix client build failure due to AlignVector after JDK-8343827

[Ludovic Henry]

On Fri, 6 Dec 2024 11:39:46 GMT, Hamlin Li <mli at openjdk.org> wrote:

> Hi,
> Can you help to review this simple fix?
> Thanks!
> 
> Previously in JDK-8343827, AlignVector was enabled conditionally, but the code was put in common path (shared with non-C2 code), but in fact this flag is only for C2.

Marked as reviewed by luhenry (Committer).

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PR Review: https://git.openjdk.org/jdk/pull/22605#pullrequestreview-2492360760