[jdk11u-dev] RFR: 8280007: Enable Neoverse N1 optimizations for Arm Neoverse V1 & N2

[Liang Mao]

Backport of JDK-8280007.

Additional testing: aarch64 server ARM Neoverse N2 release/fastdebug tier1

-------------

Commit messages:
 - Backport f823bed043dc38d838baaf8c2024ef24b8a50e9b

Changes: https://git.openjdk.org/jdk11u-dev/pull/2425/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2425&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8280007
  Stats: 5 lines in 1 file changed: 2 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2425.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2425/head:pull/2425

PR: https://git.openjdk.org/jdk11u-dev/pull/2425