[clang] [llvm] [CodeGen][AArch64] Added -mno-va-float to skip FP save in variadic functions (PR #92827)

[Jon Chesterfield via llvm-commits]

JonChesterfield wrote:

Aarch64 has a dedicated floating point region in the va_list structure. Is the intent of this patch to globally disable the use of that, such that clang should arrange to put floating point values in the stack fallback area instead?

https://github.com/llvm/llvm-project/pull/92827