[jdk22u] RFR: 8330524: Linux ppc64le compile warning with clang in os_linux_ppc.cpp

[Matthias Baesken]

Backport of 8330524

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Commit messages:
 - Backport 252c62a66dd955a5d22f307544f38cc0dd4f2550

Changes: https://git.openjdk.org/jdk22u/pull/188/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk22u&pr=188&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8330524
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk22u/pull/188.diff
  Fetch: git fetch https://git.openjdk.org/jdk22u.git pull/188/head:pull/188

PR: https://git.openjdk.org/jdk22u/pull/188