[clang] [llvm] [ARM][Clang] Make `+nosimd` functional for AArch32 Targets (PR #130623)

[David Green via llvm-commits]

davemgreen wrote:

Sorry for the delay, my computer got very slow at building things. - What goes wrong if ARM::AEK_SIMD is removed from the CPU and architecture definitions? If it is needed then there are some other cpu's where it might need to be added too. But I'm not sure what needs it. (Target parsing gets quite complex and isn't nearly as well documented as it needs to be. We could do with something that explains how it is meant to work, at a high level so we can have a coherent design).

https://github.com/llvm/llvm-project/pull/130623