RFR: 8321025: Enable Neoverse N1 optimizations for Neoverse V2

[Evgeny Astigeevich]

As Arm Neoverse V2 will benefit from the same optimizations as Neoverse N1 does, it should have OnSpinWaitInst/OnSpinWaitInstCount defaults set to "isb"/1 and UseSIMDForMemoryOps default set to true.
This patch sets these flags accordingly for the V2 architecture.

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Commit messages:
 - 8321025: Enable Neoverse N1 optimizations for Neoverse V2

Changes: https://git.openjdk.org/jdk/pull/16887/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16887&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8321025
  Stats: 3 lines in 1 file changed: 1 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/16887.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16887/head:pull/16887

PR: https://git.openjdk.org/jdk/pull/16887