[llvm] [AMDGPU] Remove s_delay_alu for VALU->SGPR->SALU (PR #127212)

[Jay Foad via llvm-commits]

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@@ -340,6 +366,7 @@ class AMDGPUInsertDelayAlu : public MachineFunctionPass {
     bool Changed = false;
     MachineInstr *LastDelayAlu = nullptr;
 
+    MCRegUnit lastSGPRfromVALU = 0;
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jayfoad wrote:

Capitalize variable names:
```suggestion
    MCRegUnit LastSGPRfromVALU = 0;
```

https://github.com/llvm/llvm-project/pull/127212