RFR: 8371450: AES performance improvements for key schedule generation [v3]

[Shawn M Emery]

> This fix improves performance in the AES key schedule generation by eliminating an unnecessary object and unnecessary mask in the inverse key schedule.
> 
> The micro:org.openjdk.bench.javax.crypto.AESReinit benchmark results are improved by 6.96% for arm64 and 7.79% for x86_64.
> 
> Thank you @jnimeh for catching the unnecessary byte mask!

Shawn M Emery has updated the pull request incrementally with one additional commit since the last revision:

  Clean up comments - take two

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/28188/files
  - new: https://git.openjdk.org/jdk/pull/28188/files/0e9d14f9..55e052f6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28188&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28188&range=01-02

  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/28188.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28188/head:pull/28188

PR: https://git.openjdk.org/jdk/pull/28188