[llvm] [AMDGPU] Compiler should synthesize private buffer resource descriptor from flat_scratch_init (PR #79586)

[Scott Linder via llvm-commits]

https://github.com/slinder1 commented:

(Sorry for adding more nits after initial review)

I'm a bit confused about the goal; does this patch just pave the way to actually stop requesting the preloaded RSRC in some cases in the future?

https://github.com/llvm/llvm-project/pull/79586