RFR: 8331393: AArch64: u32 _partial_subtype_ctr loaded/stored as 64

[Robbin Ehn]

Hi, please consider.

Let's use incw for these.

Untested, hoping GHA checks this :)

Thanks, Robbin

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

Commit messages:
 - ldrw/strw

Changes: https://git.openjdk.org/jdk/pull/19011/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19011&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8331393
  Stats: 9 lines in 2 files changed: 0 ins; 7 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/19011.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19011/head:pull/19011

PR: https://git.openjdk.org/jdk/pull/19011