RFR: 8278037: Clean up PPC32 related code in C1 [v3]

[Aleksey Shipilev]

On Wed, 1 Dec 2021 17:22:53 GMT, Ao Qi <aoqi at openjdk.org> wrote:

>> `_tmp1` and `_tmp2` were [removed](https://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/faaed259df37#l13.173) in [JDK-8160245](https://bugs.openjdk.java.net/browse/JDK-8160245), but they are still used.
>> 
>> This should cause a build error. I don't have a ppc32 machine for the test. It's also not found at https://builds.shipilev.net. Is ppc32 a supported compiler1 platform?
>
> Ao Qi has updated the pull request incrementally with one additional commit since the last revision:
> 
>   missing ")"

Marked as reviewed by shade (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/6625