[clang] [HLSL] Use hlsl_device address space for getpointer. (PR #127675)

[Helena Kotas via cfe-commits]

https://github.com/hekota approved this pull request.

LGTM! Just a couple of nits. Apologies for the delay, I was on vacation last week. :)

https://github.com/llvm/llvm-project/pull/127675