RFR: 8365153: AArch64: Set JVM flags for Neoverse N3 and V3 cores

[Ruben]

On Fri, 8 Aug 2025 14:50:13 GMT, Ruben <duke at openjdk.org> wrote:

> For Neoverse N1, N2, V1, and V2, the following JVM flags are set:
>  - UseSIMDForMemoryOps=true
>  - OnSpinWaitInst=isb
>  - OnSpinWaitInstCount=1
>  - AlwaysMergeDMB=false
> 
> Additionally, for Neoverse V1 and V2 only, these flags are set:
>  - UseCryptoPmullForCRC32=true
>  - CodeEntryAlignment=32
> 
> Set the same flags for Neoverse N3 and V3, respectively.

@theRealAph, @adinn, if this PR looks suitable, I'd appreciate if you could approve it. Please let me know if any change is required before this can be integrated.

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PR Comment: https://git.openjdk.org/jdk/pull/26701#issuecomment-3376625294