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

[Tomas Matheson via llvm-commits]

tmatheson-arm wrote:

> I've renamed `loop-align` to `branch-align` to keep it consistent. Also changed "Pref" to "Prefer"

Unfortunately you can't do that; it will break any existing IR that refers to this subtarget feature as `loop-align`.

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