[jdk24u] RFR: 8355476: RISC-V: using zext_w directly in vector_update_crc32 could trigger assert

[Hamlin Li]

8355476: RISC-V: using zext_w directly in vector_update_crc32 could trigger assert

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Commit messages:
 - Backport 3270a7d3591eac44705ff5d76c6f59cfb14f5ac0

Changes: https://git.openjdk.org/jdk24u/pull/208/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk24u&pr=208&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8355476
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk24u/pull/208.diff
  Fetch: git fetch https://git.openjdk.org/jdk24u.git pull/208/head:pull/208

PR: https://git.openjdk.org/jdk24u/pull/208