[mlir][GPU] Fix incorrect API usage in RewritePatterns

Incorrect API usage was detected by D144552.

Differential Revision: https://reviews.llvm.org/D144637

mlir/lib/Dialect/GPU/IR/GPUDialect.cpp

@@ -1333,7 +1333,7 @@ struct EraseRedundantGpuWaitOpPairs : public OpRewritePattern<WaitOp> {
         continue;
       validOperands.push_back(operand);
     }
-    op->setOperands(validOperands);
+    rewriter.updateRootInPlace(op, [&]() { op->setOperands(validOperands); });
     return success();
   }
 };