RFR: 8288478: AArch64: Clean up whitespace in assembler_aarch64.hpp [v2]

[Andrew Haley]

> This is a very light cleanup of the layout of assembler_aarch64.hpp. I also corrected a few section headers that didn't match the section names in the Arm Architectural Reference Manual.

Andrew Haley has updated the pull request incrementally with one additional commit since the last revision:

  8288478: AArch64: Clean up whitespace in assembler_aarch64.hpp

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Changes:
  - all: https://git.openjdk.org/jdk/pull/9185/files
  - new: https://git.openjdk.org/jdk/pull/9185/files/283ed81a..8612bbc0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9185&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9185&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/9185.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9185/head:pull/9185

PR: https://git.openjdk.org/jdk/pull/9185