[crac] RFR: Fix confusing but harmless typos

[Jan Kratochvil]

On Thu, 17 Jul 2025 12:42:44 GMT, Jan Kratochvil <jkratochvil at openjdk.org> wrote:

> The name `DECLARE_CPU_FEATURE_FLAG` is used in all other cases. In `vmStructs_jvmci.cpp` there was no matching `#define`.

Only MS-Windows are failing and that is an infrastructure problem:

checking that Visual Studio variables have been correctly extracted... ok
checking for cl... [not found]
configure: error: Could not find a C compiler.

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PR Comment: https://git.openjdk.org/crac/pull/245#issuecomment-3084311349