[llvm] [NFC] Modify the comment of LoopRotate param (PR #180675)

[Pengcheng Wang via llvm-commits]

================
@@ -512,7 +512,7 @@ PassBuilder::buildO1FunctionSimplificationPipeline(OptimizationLevel Level,
   LPM1.addPass(LICMPass(PTO.LicmMssaOptCap, PTO.LicmMssaNoAccForPromotionCap,
                         /*AllowSpeculation=*/false));
 
-  LPM1.addPass(LoopRotatePass(/* Disable header duplication */ true,
+  LPM1.addPass(LoopRotatePass(/* Enable header duplication */ true,
                               isLTOPreLink(Phase)));
----------------
wangpc-pp wrote:

```suggestion
  LPM1.addPass(
      LoopRotatePass(/*EnableHeaderDuplication=*/true, isLTOPreLink(Phase)));
```

https://github.com/llvm/llvm-project/pull/180675