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

[Matt Arsenault via llvm-commits]

================
@@ -191,3 +197,11 @@ AMDGPUArgumentUsageInfo::lookupFuncArgInfo(const Function &F) const {
     return FixedABIFunctionInfo;
   return I->second;
 }
+
+AnalysisKey AMDGPUArgumentUsageAnalysis::Key;
----------------
arsenm wrote:

```suggestion
AnalysisKey AMDGPUArgumentUsageAnalysis::Key;

```

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