[llvm] [AArch64] Intrinsics aarch64_{get,set}_fpsr (PR #81867)

[Serge Pavlov via llvm-commits]

spavloff wrote:

I don't see function that operate FP status bits in acle.
GCC has functions close to these intrinsics: https://gcc.gnu.org/onlinedocs/gcc/AArch64-Built-in-Functions.html.

https://github.com/llvm/llvm-project/pull/81867