Lionel Messi scored a hat-trick as Barcelona regained the title in LaLiga with a pulsating 4-2 win against Deportivo La Coruna, who were relegated. The runaway leaders headed into Sunday’s fixture at the Riazor knowing a point would be enough to win a seventh title in the past 10 seasons and the 25th in their history. A routine victory looked on the cards from the moment Philippe Coutinho finished Ousmane Dembele’s pass, and Messi scored a 30th league goal of the campaign from Luis Suarez’s sensational assist to double the lead. But Depor, who had to win to avoid going…