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

[Dean Long]

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.

-------------

Commit messages:
 - Merge branch 'master' of github.com:openjdk/jdk into 8272050
 - fix typo

Changes: https://git.openjdk.java.net/jdk/pull/5060/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5060&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272050
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5060.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5060/head:pull/5060

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