[clang] [flang] [llvm] [AArch64][Driver] Better handling of target feature dependencies (PR #78270)

[David Spickett via cfe-commits]

https://github.com/DavidSpickett commented:

Happy to see this change, will be a lot easier to reason about this once it's all in one place.

https://github.com/llvm/llvm-project/pull/78270