[llvm] [AMDGPU][NPM] Port AMDGPUArgumentUsageInfo to NPM (PR #170886)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm commented:

This resulted in fallback to FixedABIFunctionInfo which assumes all implicit arguments are needed, generating unnecessary register setup code for entry functions.

https://github.com/llvm/llvm-project/pull/170886