RFR: 8344983: [PPC64] Rename ConditionRegisters

[Andrew Haley]

On Tue, 28 Jan 2025 08:31:59 GMT, Sorna Sarathi N <ssarathi at openjdk.org> wrote:

> 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)

I understand the motivation, but maybe the reason this was never done before is that it will make back-porting fixes harder. They will never apply cleanly to old versions, and will all have to be adjusted manually.

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PR Comment: https://git.openjdk.org/jdk/pull/23325#issuecomment-2618394421