[clang] [CIR][AArch64] Use CIR's fma and sqrt for Neon builtins (PR #213800)

[Andrzej Warzyński via cfe-commits]

https://github.com/banach-space approved this pull request.

Thank you for fixing this, Andy! And sorry for not noticing this earlier.

LGTM

https://github.com/llvm/llvm-project/pull/213800