RFR: 8374351: RISC-V: Small refactoring for crypto macro-assembler routines [v2]

[Anjian Wen]

> This patch is mainly for readability and subsequent GCM call requirements.
> 
> 1. Extract the ghash function to facilitate subsequent calls during the implementation of aes-gcm 
> 2. Unify the prefixes of function names for aes intrinsic-related functions. Only use generate prefix for the main intrinsic function, delete the other functions `generate_` prefix

Anjian Wen has updated the pull request incrementally with one additional commit since the last revision:

  Swap the order of the function name to make it clear

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Changes:
  - all: https://git.openjdk.org/jdk/pull/28988/files
  - new: https://git.openjdk.org/jdk/pull/28988/files/84b3fde7..f98ee4a1

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28988&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28988&range=00-01

  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/28988.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28988/head:pull/28988

PR: https://git.openjdk.org/jdk/pull/28988