RFR: 8323809: Serial: Refactor card table verification

Tue Jan 16 14:37:30 UTC 2024

Simple refactoring and remove much outdated comments.

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Commit messages:
 - s1-card-verify

Changes: https://git.openjdk.org/jdk/pull/17447/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17447&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8323809
  Stats: 273 lines in 2 files changed: 14 ins; 229 del; 30 mod
  Patch: https://git.openjdk.org/jdk/pull/17447.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17447/head:pull/17447

PR: https://git.openjdk.org/jdk/pull/17447