RFR: 8355704: RISC-V: enable TestIRFma.java

[Hamlin Li]

Hi,
Can you help to review this patch to enable TestIRFma.java?
FmaF/D (checked by TestIRFma.java) are supported on riscv, but for some reason we can not enable it easily, but we should enable it.

Also tested on machine with `asimd` support.

Thanks!

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Commit messages:
 - change matching type
 - initial commit

Changes: https://git.openjdk.org/jdk/pull/24947/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=24947&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8355704
  Stats: 50 lines in 2 files changed: 16 ins; 0 del; 34 mod
  Patch: https://git.openjdk.org/jdk/pull/24947.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/24947/head:pull/24947

PR: https://git.openjdk.org/jdk/pull/24947