The Charlotte Observer (Rick Bonnell) reports:  Charlotte Bobcats majority owner Bob Johnson has stepped up efforts to sell the team, recently hiring a sports investment banker to look for a buyer. Sal Galatioto, president of New York-based Galatioto Sports Partners, confirmed to the Observer Thursday that he’s representing Johnson in a potential sale. Galatioto declined to comment further on the situation. Johnson told Observer columnist Scott Fowler last month that he’d like to sell controlling interest to minority owner Michael Jordan, the former NBA star who oversees the team’s basketball operations. Since then, according to multiple NBA sources, Johnson has begun looking for other potential buyers.