RFR: 8312979: Fix assembler_aarch64.hpp after JDK-8311847 [v2]

[Coleen Phillimore]

> This passes linux-aarch64-debug.  Waiting for GHA to see if it passes windows-aarch64.

Coleen Phillimore has updated the pull request incrementally with one additional commit since the last revision:

  Maybe this is better.

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Changes:
  - all: https://git.openjdk.org/jdk/pull/15023/files
  - new: https://git.openjdk.org/jdk/pull/15023/files/0d2d8b90..b1be335a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15023&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15023&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/15023.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15023/head:pull/15023

PR: https://git.openjdk.org/jdk/pull/15023