[llvm] [SelectionDAG] Use SDNode::op_iterator instead of SDNodeIterator. NFC (PR #122147)

[Simon Pilgrim via llvm-commits]

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@@ -2986,8 +2986,7 @@ bool TargetLowering::SimplifyDemandedBits(
       DemandedBits.isSubsetOf(Known.Zero | Known.One)) {
     // Avoid folding to a constant if any OpaqueConstant is involved.
     const SDNode *N = Op.getNode();
-    for (SDNode *Op :
-         llvm::make_range(SDNodeIterator::begin(N), SDNodeIterator::end(N))) {
+    for (SDValue Op : N->ops()) {
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RKSimon wrote:

Op->ops();

https://github.com/llvm/llvm-project/pull/122147