BUFFALO, N.Y. — When the Blackhawks drafted Swedish forward Anton Frondell a year ago, they knew he would likely return for one more season in his home country before making the NHL leap, and that’s exactly what happened. Ivar Stenberg, arguably the odds-on favorite at the moment to be the Hawks’ fourth overall pick this year, has no such plans. He believes he’s ready for the NHL immediately. “I want to play over here and play in the best league…