[compiler-rt] [llvm] Add missing extendhfxf2 in compiler rt (PR #109090)

[via llvm-commits]

lntue wrote:

> ⚠️ C/C++ code formatter, clang-format found issues in your code. ⚠️
> 
> You can test this locally with the following command:
> View the diff from clang-format here.

Can you run clang-format and sync to head to fix buildkite errors?  Thanks

https://github.com/llvm/llvm-project/pull/109090