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

[via llvm-commits]

ronlieb wrote:

@alex-t   could you try applying  your patch to AMD internal gerrit ?
would help us with some down stream merges attn: @saiislam .
thx


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