RFR: 8253284: Zero OrderAccess barrier mappings are incorrect [v2]

[Aleksey Shipilev]

> There are some jcstress failures with AArch64 Zero. It seems because to happen because `orderAccess_linux_zero.hpp`
> defaults to compiler-only barriers for most OrderAccess::* calls. We need to defer to the strongest barriers by
> default.   The code also needs some rearrangement to make the mappings clear.

Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision:

  Fix copy-paste omission in bsd_zero

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/224/files
  - new: https://git.openjdk.java.net/jdk/pull/224/files/012a59a3..add14aa2

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=224&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=224&range=00-01

  Stats: 2 lines in 1 file changed: 2 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/224.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/224/head:pull/224

PR: https://git.openjdk.java.net/jdk/pull/224