STOCKHOLM, SWEDEN, May 30 : Finland came back from a goal down to win 4-2 over top seeds Canada and book their spot in the final of the IIHF Ice Hockey World Championship where they will face host nation Switzerland, who hammered Norway 6-0 earlier in the day.  Finland took the lead at the 3:30 mark of the first period, turning over the Canadians and feeding the puck to Patrik Puistola, who whipped it into the top-right corner of the net to cap a perfect breakaway. Canada, who suffered an overtime loss to the U.S. in February’s Winter Olympic gold medal match, levelled less than five minutes later through Robert Thomas, who pounced on a deflected shot to score. They took the lead when Dylan Holloway took down a lofted pass and fired home to leave them 2-1 up after the first frame. Undeterred, the Finns came roaring out of the traps and broke the game open in a stellar second period, Aleksander Barkov scoring after 49 seconds and Konsta Helenius and Aatu Raty adding …