[jdk18u] RFR: 8280867: Cpuid1Ecx feature parsing is incorrect for AMD CPUs

[Tobias Hartmann]

Backport of [JDK-8280867](https://bugs.openjdk.java.net/browse/JDK-8280867). Applies cleanly. Approval is pending.

Thanks,
Tobias

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Commit messages:
 - 8280867: Cpuid1Ecx feature parsing is incorrect for AMD CPUs

Changes: https://git.openjdk.java.net/jdk18u/pull/70/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=70&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8280867
  Stats: 9 lines in 1 file changed: 0 ins; 1 del; 8 mod
  Patch: https://git.openjdk.java.net/jdk18u/pull/70.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18u pull/70/head:pull/70

PR: https://git.openjdk.java.net/jdk18u/pull/70