[riscv-port-jdk17u:riscv-port] RFR: 8297359: RISC-V: improve performance of floating Max Min intrinsics

[Vladimir Kempik]

Please review this clean backport of JDK-[8297359](https://bugs.openjdk.org/browse/JDK-8297359) to jdk17u riscv port dev
This significantly improves performance of fp min/max instrinsics.
Results are same as in upstream jdk - https://mail.openjdk.org/pipermail/riscv-port-dev/2022-November/000684.html

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Commit messages:
 - 8297359: RISC-V: improve performance of floating Max Min intrinsics

Changes: https://git.openjdk.org/riscv-port-jdk17u/pull/49/files
 Webrev: https://webrevs.openjdk.org/?repo=riscv-port-jdk17u&pr=49&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8297359
  Stats: 33 lines in 2 files changed: 12 ins; 11 del; 10 mod
  Patch: https://git.openjdk.org/riscv-port-jdk17u/pull/49.diff
  Fetch: git fetch https://git.openjdk.org/riscv-port-jdk17u.git pull/49/head:pull/49

PR: https://git.openjdk.org/riscv-port-jdk17u/pull/49