[llvm] [VPlan] Use VPlan operand order for VPBlendRecipes. (PR #139475)

[via llvm-commits]

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@@ -125,7 +125,7 @@ class VPRecipeBuilder {
   /// Handle non-loop phi nodes. Return a new VPBlendRecipe otherwise. Currently
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ayalz wrote:

Independent:
```suggestion
  /// Handle non-loop phi nodes, returning a new VPBlendRecipe. Currently
```

https://github.com/llvm/llvm-project/pull/139475