RFR: 8295968: RISC-V: Rename some assembler intrinsic functions for RVV 1.0.

[Dingli Zhang]

Hi,

Some instructions previously had old assembler notation, but were renamed in RVV1.0[1][2] to be consistent with scalar instructions. We'd better keep the name the same as the new assembler mnemonics.

[1] https://github.com/riscv/riscv-v-spec/blob/v1.0/v-spec.adoc#152-vector-count-population-in-mask-vcpopm
[2] https://github.com/riscv/riscv-v-spec/blob/v1.0/v-spec.adoc#151-vector-mask-register-logical-instructions

Please take a look and have some reviews. Thanks a lot.

## Testing:

- hotspot and jdk tier1 on unmatched board without new failures

-------------

Commit messages:
 - Rename some assembler intrinsic functions for RVV 1.0

Changes: https://git.openjdk.org/jdk/pull/10878/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10878&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8295968
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/10878.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10878/head:pull/10878

PR: https://git.openjdk.org/jdk/pull/10878