RFR: 8284990: AArch64: Remove STXR_PREFETCH from CPU features

[Ningsheng Jian]

On Tue, 26 Jul 2022 14:59:19 GMT, Eric Liu <eliu at openjdk.org> wrote:

> As STXR_PREFETCH is usually done unconditionally in non-JVM code, e.g.,
> Linux ARM Kernel[1], this patch removes VM_Version::CPU_STXR_PREFETCH
> and generates it unconditionally.
> 
> [1] https://patchwork.kernel.org/project/linux-arm-kernel/patch/1436779519-2232-16-git-send-email-will.deacon@arm.com/
> 
> [TEST]
> Full Jtreg passed without new failure.

Marked as reviewed by njian (Committer).

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PR: https://git.openjdk.org/jdk/pull/9641