[llvm] LV: fix style after cursory reading (NFC) (PR #105830)

[Nikita Popov via llvm-commits]

================
@@ -5636,10 +5628,10 @@ LoopVectorizationCostModel::getMemInstScalarizationCost(Instruction *I,
     Cost /= getReciprocalPredBlockProb();
 
     // Add the cost of an i1 extract and a branch
-    auto *Vec_i1Ty =
+    auto *Veci1Ty =
----------------
nikic wrote:

```suggestion
    auto *VecI1Ty =
```
Or leave it as is.

https://github.com/llvm/llvm-project/pull/105830