RFR: 8329839: Cleanup ZPhysicalMemoryBacking trace logging

Mon Apr 8 09:16:18 UTC 2024

On bsd the MB scaling is only performed on the length and not the base offset so the numbers printed are wrong.

On all other platforms the `zoffset` type is used incorrectly and should use `zoffset_end` when printing offsets that point to the end of a range.

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Commit messages:
 - 8329839: Cleanup ZPhysicalMemoryBacking trace logging

Changes: https://git.openjdk.org/jdk/pull/18671/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18671&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8329839
  Stats: 6 lines in 3 files changed: 0 ins; 0 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/18671.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18671/head:pull/18671

PR: https://git.openjdk.org/jdk/pull/18671