RFR: 8367478: Improve UseAVX setting and add cpu descriptions for zhaoxin processors [v3]

[Vic Wang]

> Here is the patch that improving the UseAVX setting and add cpu descriptions for zhaoxin processors.
> Can you help to review this patch?
> Thank you!

Vic Wang has refreshed the contents of this pull request, and previous commits have been removed. The incremental views will show differences compared to the previous content of the PR. The pull request contains two new commits since the last revision:

 - Move cpu_model_id to the zx-specific if branch.
 - Improve UseAVX setting and add cpu descriptions for zhaoxin processors.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/27241/files
  - new: https://git.openjdk.org/jdk/pull/27241/files/c75c0eff..535af7ba

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=27241&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=27241&range=01-02

  Stats: 2 lines in 1 file changed: 1 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/27241.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27241/head:pull/27241

PR: https://git.openjdk.org/jdk/pull/27241