[jdk21u-dev] RFR: 8337657: AArch64: No need for acquire fence in safepoint poll during JNI calls

[Dmitry Chuyko]

This a clean backport of acquire fence removal in safepoint poll during JNI calls.

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Commit messages:
 - Backport 358d77dafbe0e35d5b20340fccddc0fb8f3db82a

Changes: https://git.openjdk.org/jdk21u-dev/pull/1545/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk21u-dev&pr=1545&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8337657
  Stats: 19 lines in 2 files changed: 0 ins; 15 del; 4 mod
  Patch: https://git.openjdk.org/jdk21u-dev/pull/1545.diff
  Fetch: git fetch https://git.openjdk.org/jdk21u-dev.git pull/1545/head:pull/1545

PR: https://git.openjdk.org/jdk21u-dev/pull/1545