RFR: 8362524: Fix confusing but harmless typos in x86 CPU Features [v2]

[Jan Kratochvil]

> The name `DECLARE_CPU_FEATURE_FLAG` is used in all other cases. In `vmStructs_jvmci.cpp` there was no matching `#define`.

Jan Kratochvil has updated the pull request incrementally with one additional commit since the last revision:

  Call it DECLARE_CPU_FEATURE_NAME

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/26371/files
  - new: https://git.openjdk.org/jdk/pull/26371/files/56c13975..eb8a5261

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=26371&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=26371&range=00-01

  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/26371.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26371/head:pull/26371

PR: https://git.openjdk.org/jdk/pull/26371