Add CFI directives in aesv8-armx.pl

[andrewhop]

Issues:

Addresses #2459

Description of changes:

Add more missing CFI directives.

Call-outs:

Point out areas that need special attention or support during the review process. Discuss architecture or design changes.

Testing:

Before:

After:

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and the ISC license.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 78.71%. Comparing base (67ef2bd) to head (f69cd47).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #2634   +/-   ##
=======================================
  Coverage   78.71%   78.71%           
=======================================
  Files         646      646           
  Lines      111213   111213           
  Branches    15711    15711           
=======================================
  Hits        87544    87544           
- Misses      22975    22976    +1     
+ Partials      694      693    -1     

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