[clang] [compiler-rt] [llvm] [FMV][AArch64] Unify ls64, ls64_v and ls64_accdata. (PR #108024)

[Andrew Carlotti via cfe-commits]

================
@@ -73,8 +73,6 @@ enum CPUFeatures {
   FEAT_SSBS,
   FEAT_SSBS2,
   FEAT_BTI,
-  FEAT_LS64,
-  FEAT_LS64_V,
----------------
andrewcarlotti wrote:

I think we might need to keep the enum values stable, although I'm not sure whether this could actually cause any issues yet.
(c.f. https://github.com/llvm/llvm-project/pull/88965#pullrequestreview-2004684899, which didn't reach any conclusion)

https://github.com/llvm/llvm-project/pull/108024