[llvm] [AArch64] Disable FP loads/stores when fp-armv8 not enabled (PR #77817)

[via llvm-commits]

ostannard wrote:

This is the script I used to check for non-predicated instructions: https://gist.github.com/ostannard/f15ad6b4cffc9b00b1ee50f990dd801d

https://github.com/llvm/llvm-project/pull/77817