[jdk22] RFR: 8321542: C2: Missing ChaCha20 stub for x86_32 leads to crashes

[Jamil Nimeh]

This is the JDK 22 backport of JDK-8321542

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Commit messages:
 - Backport 5718039a46ae51fa9b7042fe7163e3637e981b05

Changes: https://git.openjdk.org/jdk22/pull/14/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk22&pr=14&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8321542
  Stats: 8 lines in 1 file changed: 8 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk22/pull/14.diff
  Fetch: git fetch https://git.openjdk.org/jdk22.git pull/14/head:pull/14

PR: https://git.openjdk.org/jdk22/pull/14