RFR: 8316935: [s390x] Use consistent naming for lightweight locking in MacroAssembler

[Lutz Schmidt]

On Tue, 26 Sep 2023 08:59:44 GMT, Amit Kumar <amitkumar at openjdk.org> wrote:

> We (s390) also needs to update our naming from fast_lock & fast_unlock to MacroAssembler::lightweight_lock and MacroAssembler::lightweight_unlock respectively.

Looks good to me. 
Changes which are classified "trivial" by a Reviewer can be integrated with just one positive review. Now you've got both: two reviews and a trivial classification.

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Marked as reviewed by lucy (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/15915#pullrequestreview-1644295073