[llvm] [AMDGPU] NFC: Obviously show isVALU includes LDSDMA instructions (PR #203548)

[Jay Foad via llvm-commits]

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@@ -646,12 +652,13 @@ class SIInstrInfo final : public AMDGPUGenInstrInfo {
   }
 
   static bool isLDSDMA(const MachineInstr &MI) {
-    return (isVALU(MI) && (isMUBUF(MI) || isFLAT(MI))) ||
+    return (isVALU(MI, /*AllowLDSDMA=*/true) && (isMUBUF(MI) || isFLAT(MI))) ||
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jayfoad wrote:

I don't really like the way this makes isVALU and isLDSDMA mutually recursive. Maybe just expand the `MI.getDesc().TSFlags & SIInstrFlags::VALU` part here instead of calling isVALU? Same below.

https://github.com/llvm/llvm-project/pull/203548