RFR: JDK-8328709: AIX os::get_summary_cpu_info support Power 10

[Matthias Baesken]

AIX os::get_summary_cpu_info function still misses support for Power 10 processors, this should be changed.

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Commit messages:
 - JDK-8328709

Changes: https://git.openjdk.org/jdk/pull/18432/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18432&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328709
  Stats: 13 lines in 1 file changed: 11 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/18432.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18432/head:pull/18432

PR: https://git.openjdk.org/jdk/pull/18432