[llvm] [AMDGPU][SIInsertWaitcnts][NFC] Drop MaxCounter member variable (PR #181092)

[Sameer Sahasrabuddhe via llvm-commits]

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@@ -2998,8 +3004,10 @@ bool WaitcntBrackets::mergeAsyncMarks(ArrayRef<MergeInfo> MergeInfos,
   unsigned OurSize = AsyncMarks.size();
   unsigned MergeCount = std::min(OtherSize, OurSize);
   assert(OurSize == MaxSize);
+  const InstCounterType MaxCounter =
+      getMaxCounter(*Context->ST, Context->IsExpertMode);
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ssahasra wrote:

Looks like everything that this function needs is coming from Context. Then you might as well move this function itself to Context.

https://github.com/llvm/llvm-project/pull/181092