RFR: 8341052: SHA-512 implementation using SHA-NI

[Smita Kamath]

8341052: SHA-512 implementation using SHA-NI

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

Commit messages:
 - Updated AMD64.java
 - Merge master
 - SHA-512 implementation using SHA-NI instructions

Changes: https://git.openjdk.org/jdk/pull/20633/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20633&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8341052
  Stats: 267 lines in 10 files changed: 250 ins; 11 del; 6 mod
  Patch: https://git.openjdk.org/jdk/pull/20633.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20633/head:pull/20633

PR: https://git.openjdk.org/jdk/pull/20633