[jdk17u-dev] RFR: 8277860: PPC: Remove duplicate info != NULL check

[Aleksey Shipilev]

Clean follow-up backport.

Additional testing:
 - [ ] GHA builds

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Depends on: https://git.openjdk.org/jdk17u-dev/pull/1528

Commit messages:
 - Backport ce0234b47d5c40e74dac368396e92cdec5cc2de7

Changes: https://git.openjdk.org/jdk17u-dev/pull/1529/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1529&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8277860
  Stats: 6 lines in 1 file changed: 0 ins; 2 del; 4 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1529.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1529/head:pull/1529

PR: https://git.openjdk.org/jdk17u-dev/pull/1529