[llvm] [llvm][ARM][NFC] Renaming FeaturePrefLoopLogAlign (PR #109932)

[Nashe Mncube via llvm-commits]

nasherm wrote:

> > I've renamed `loop-align` to `branch-align` to keep it consistent.
> 
> Unfortunately you can't do that; it will break any existing IR that refers to this subtarget feature as `loop-align`.

Ah I see, thanks for pointing this out. 

https://github.com/llvm/llvm-project/pull/109932