[SelectionDAG] Fix incorrect indentation. NFC

Author: topperc

llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp

@@ -3036,7 +3036,7 @@ bool SelectionDAG::isSplatValue(SDValue V, const APInt &DemandedElts,
       return TLI->isSplatValueForTargetNode(V, DemandedElts, UndefElts, *this,
                                             Depth);
     break;
-}
+  }
 
   // We don't support other cases than those above for scalable vectors at
   // the moment.