RFR: 8344983: [PPC64] Rename ConditionRegisters

[Sorna Sarathi N]

PPC64 currently uses the names CCR0 to CCR7 for Condition Registers. This PR renames them as CR0 to CR7 matching the ISA. Build(release debug level) and testing are successful.

JBS Issue: [JDK-8344983](https://bugs.openjdk.org/browse/JDK-8344983)

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Commit messages:
 - Renaming the Condition Registers

Changes: https://git.openjdk.org/jdk/pull/23325/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=23325&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8344983
  Stats: 1386 lines in 32 files changed: 0 ins; 0 del; 1386 mod
  Patch: https://git.openjdk.org/jdk/pull/23325.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/23325/head:pull/23325

PR: https://git.openjdk.org/jdk/pull/23325