They ended years of frustration. They ended the Detroit Pistons’ two-year reign as champions. And now, the Chicago Bulls can begin thinking about playing in the NBA finals for the first time. Making it look easy, the Bulls completed a four-game sweep of the Pistons with a 115-94 victory today at the Palace of Auburn Hills. Chicago dominated the Eastern Conference finals from start to finish, brushing aside the proud Pistons as if they were a nuisance instead of the defending champions. The …