[llvm] [AMDGPU] Factor out common code from SIInsertWaitcnts (PR #83018)

[Jay Foad via llvm-commits]

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@@ -14,6 +14,7 @@
 #include "llvm/IR/InstrTypes.h"
 #include "llvm/IR/Module.h"
 #include "llvm/Support/Alignment.h"
+#include "llvm/TargetParser/TargetParser.h"
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jayfoad wrote:

Don't change this. It's generally better to forward-declare things in headers, instead of including more headers, to reduce transitive dependencies.

https://github.com/llvm/llvm-project/pull/83018