[riscv-port-jdk11u:riscv-port] RFR: 8299847: RISC-V: Improve PrintOptoAssembly output of CMoveI/L nodes

[Dingli Zhang]

Please review this backport to riscv-port-jdk11u.
Backport of [JDK-8299847](https://bugs.openjdk.org/browse/JDK-8299847). 
The original patch cannot be directly applied because of the line number, but there are no other additional changes.

Testing:
- Tier1 passed w/o new failure on LPi4A(release).

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Commit messages:
 - 8299847: RISC-V: Improve PrintOptoAssembly output of CMoveI/L nodes

Changes: https://git.openjdk.org/riscv-port-jdk11u/pull/24/files
  Webrev: https://webrevs.openjdk.org/?repo=riscv-port-jdk11u&pr=24&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299847
  Stats: 40 lines in 1 file changed: 0 ins; 12 del; 28 mod
  Patch: https://git.openjdk.org/riscv-port-jdk11u/pull/24.diff
  Fetch: git fetch https://git.openjdk.org/riscv-port-jdk11u.git pull/24/head:pull/24

PR: https://git.openjdk.org/riscv-port-jdk11u/pull/24