RFR: 8367320: Sort cpu/x86 includes

[Francesco Andreuzzi]

Sort includes in `cpu/x86` using `SortIncludes.java`. I'm also removing a couple unnecessary ones.

Passes `tier1` and `tier2`.

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Commit messages:
 - revert
 - sort

Changes: https://git.openjdk.org/jdk/pull/27189/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27189&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8367320
  Stats: 107 lines in 40 files changed: 45 ins; 61 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/27189.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/27189/head:pull/27189

PR: https://git.openjdk.org/jdk/pull/27189