Michael Frolik has turned into the Blackhawks’ utility player this season: growing into his penalty-killing role, playing on the fourth line, then moving to the top line when Marian Hossa was hurt. Now he’s on the move again to the Blackhawks’ second line. And to left wing. But for Frolik, it’s just one more adjustment and one more challenge he’s willing to try. Frolik will be on Dave Bolland’s left side when the Blackhawks host the St. Louis Blues tonight at the United Center. It’s one more move for Frolik, who’s taken it all in stride and tried to capitalize on his opportunities. His move to the top line, which ends now that Hossa is back from his shoulder injury, generated his first goals since scoring in the season opener on Jan. 19. And Frolik hopes the move to second line keeps him going. “Coaches told me to just keep playing the same way, keep it simple, don’t always just try to find (Patrick) Kane,” said Frolik, who will be doing that from a different side. “It’s a little adjustment going to the left side. I used to play both, so it’s not something big. The first few shifts I’ll have to get used to it. After that, it’s fine.”