[clang] [llvm] [LLVM] Add intrinsics for v_cvt_pk_norm_{i16, u16}_f16 (PR #135631)

[David Stuttard via cfe-commits]

dstutt wrote:

Check code formatting job is failing in a weird way. I can't work out what the issue is.

https://github.com/llvm/llvm-project/pull/135631