RFR: 8272310: AArch64: Add missing changes for shared vector helper methods in m4 files

[Xiaohong Gong]

This is a followed-up fixing to [1] which moved several vector helper methods to a shared header. However, the changes in the
aarch64 ad files (`aarch64_neon.ad, aarch64_sve.ad`) are forgotten to be added into the relative m4 files.

This patch adds the missing changes in the m4 files to make everything right.

[1] https://bugs.openjdk.java.net/browse/JDK-8270519

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Commit messages:
 - 8272310: AArch64: Add missing changes for shared vector helper methods in m4 files

Changes: https://git.openjdk.java.net/jdk/pull/5081/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5081&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8272310
  Stats: 7 lines in 2 files changed: 0 ins; 0 del; 7 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5081.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5081/head:pull/5081

PR: https://git.openjdk.java.net/jdk/pull/5081