RFR: 8355293: [TEST] RISC-V: enable more ir tests

[Hamlin Li]

Hi,
Can you help to review this simple patch?
It just enables some test to run on riscv.

Thanks

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Commit messages:
 - initial commit

Changes: https://git.openjdk.org/jdk/pull/24797/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24797&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8355293
  Stats: 41 lines in 5 files changed: 12 ins; 6 del; 23 mod
  Patch: https://git.openjdk.org/jdk/pull/24797.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24797/head:pull/24797

PR: https://git.openjdk.org/jdk/pull/24797