RFR: 8331733: [PPC64] saving and restoring CR is not needed at most places [v4]

[Varada M]

> PPC64 uses save/restore CR less often. Only LR is critical, CR is mainly needed for native-to-Java calls.
> Fastdebug: build and tier1 testing successful. [unrelated failures]

Varada M has updated the pull request incrementally with one additional commit since the last revision:

  [PPC64] saving and restoring CR is not needed at most places

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Changes:
  - all: https://git.openjdk.org/jdk/pull/19494/files
  - new: https://git.openjdk.org/jdk/pull/19494/files/f01de445..3445e9ac

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19494&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19494&range=02-03

  Stats: 2 lines in 2 files changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/19494.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19494/head:pull/19494

PR: https://git.openjdk.org/jdk/pull/19494