RFR: 8370244: [PPC64] Several vector tests fail on Power8

[David Briemann]

On Mon, 10 Nov 2025 11:01:33 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> This is a workaround for [JDK-8370803](https://bugs.openjdk.org/browse/JDK-8370803). Power8 uses `MaxVectorSize`=8 by default. All tests are passing with `EnableVectorSupport` disabled.

Lgtm. Thanks!

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Marked as reviewed by dbriemann (Committer).

PR Review: https://git.openjdk.org/jdk/pull/28214#pullrequestreview-3443471272