RFR: 8339793: Fix incorrect APX feature enabling with -XX:-UseAPX [v2]

[Jatin Bhateja]

> Currently VM_Supports::supports_apx_f() returns a true value even if user explicitly pass -XX:-UseAPX runtime flag, this enables APX specific code and register set.
> 
> This bug fix patch turn off the APX_F feature if UseAPX runtime flag is explicitly set to false value.
> 
> Best Regards,
> Jatin

Jatin Bhateja has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains two additional commits since the last revision:

 - Merge branch 'master' of http://github.com/openjdk/jdk into JDK-8339793
 - 8339793: Fix incorrect APX feature enabling with -XX:-UseAPX.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/20921/files
  - new: https://git.openjdk.org/jdk/pull/20921/files/bb6ebe5a..86d90d7c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=20921&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=20921&range=00-01

  Stats: 18761 lines in 468 files changed: 10371 ins; 5668 del; 2722 mod
  Patch: https://git.openjdk.org/jdk/pull/20921.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20921/head:pull/20921

PR: https://git.openjdk.org/jdk/pull/20921