[lilliput-jdk21u:lilliput] RFR: 8319900: Recursive lightweight locking: riscv64 implementation

[Roman Kennke]

Hi all,

This pull request contains a backport of commit [e1b661f8](https://github.com/openjdk/jdk/commit/e1b661f8c1df780cce28fe76d257b44e2fe44058) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Gui Cao on 5 Mar 2024 and was reviewed by Fei Yang.

Thanks!

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Commit messages:
 - Backport e1b661f8c1df780cce28fe76d257b44e2fe44058

Changes: https://git.openjdk.org/lilliput-jdk21u/pull/26/files
  Webrev: https://webrevs.openjdk.org/?repo=lilliput-jdk21u&pr=26&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319900
  Stats: 613 lines in 9 files changed: 411 ins; 114 del; 88 mod
  Patch: https://git.openjdk.org/lilliput-jdk21u/pull/26.diff
  Fetch: git fetch https://git.openjdk.org/lilliput-jdk21u.git pull/26/head:pull/26

PR: https://git.openjdk.org/lilliput-jdk21u/pull/26