RFR: 8272050: typo in MachSpillCopyNode::implementation after JDK-8131362

[Dean Long]

On Tue, 10 Aug 2021 06:30:01 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

>> After refactoring done by JDK-8131362, the fpr --> fpr case now checks "cbuf" instead of "is64" when it decides between fmovd and fmovs. But since this is register to register, it appears to be harmless.
>
> Marked as reviewed by thartmann (Reviewer).

Thanks for the reviews, @TobiHartmann and @vnkozlov.

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PR: https://git.openjdk.java.net/jdk/pull/5060