[llvm] [clang] [AMDGPU] Enable OpenCL hostcall printf (WIP) (PR #72556)

[Vikram Hegde via cfe-commits]

vikramRH wrote:

@arsenm , apologies for the trouble here. I should have based this out of my earlier commit. currently I do not see a way to base this patch off of my earlier commit and it might get too confusing for other reviewers if I close this and raise another review. would the individual commit details suffice ?

https://github.com/llvm/llvm-project/pull/72556