[lldb] [llvm] [lldb][FreeBSD][AArch64] Enable register field detection (PR #85058)

[David Spickett via llvm-commits]

DavidSpickett wrote:

CI failure is an unrelated BOLT test:
```
_bk;t=1719829907081Failed Tests (1):
<...>
_bk;t=1719829907081  BOLT :: X86/reader-stale-yaml-std.test
<...>
_bk;t=1719829907081  Failed           :   1 (0.22%)
```

https://github.com/llvm/llvm-project/pull/85058