[clang] [llvm] [AArch64] Fix feature flags dependecies (PR #90612)

[Tomas Matheson via cfe-commits]

https://github.com/tmatheson-arm commented:

This might need reworked since I landed https://github.com/llvm/llvm-project/pull/90987.. Ping me internally if I can help.

https://github.com/llvm/llvm-project/pull/90612