[clang] [llvm] [OpenMP] Preserve the original address when `use_device_ptr/addr` lookup fails. (PR #169438)

[Abhinav Gaba via cfe-commits]

abhinavgaba wrote:

Moved to https://github.com/llvm/llvm-project/pull/174659 to work better with the rest of the PR stack.

https://github.com/llvm/llvm-project/pull/169438