[llvm] [NFC][DirectX] Fix build failure (PR #155441)

[Rahul Joshi via llvm-commits]

jurahul wrote:

Thanks, updated the commit message with the failure seen and the root cause (that @bogner mentioned in https://github.com/llvm/llvm-project/pull/154249).

https://github.com/llvm/llvm-project/pull/155441