[node] Optimize the method Node::OwnedBy(Node const* owner)

Optimize the implementation of this method by removing unnecessary
bitwise OR operation.

Change-Id: Ic16e0d556d7fca6883aed77e592faa2fdd602624
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2709558Reviewed-by: Maya Lekova <mslekova@chromium.org>
Commit-Queue: Maya Lekova <mslekova@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73039}

src/compiler/node.cc

@@ -314,15 +314,12 @@ void Node::ReplaceUses(Node* that) {
 }
 
 bool Node::OwnedBy(Node const* owner) const {
-  unsigned mask = 0;
   for (Use* use = first_use_; use; use = use->next) {
-    if (use->from() == owner) {
-      mask |= 1;
-    } else {
+    if (use->from() != owner) {
       return false;
     }
   }
-  return mask == 1;
+  return first_use_ != nullptr;
 }
 
 bool Node::OwnedBy(Node const* owner1, Node const* owner2) const {