This was hardly the Merry Kristaps the Knicks imagined. Knicks center Enes Kanter was sensational with a 31-point, 22-rebound explosion, but Kristaps Porzingis didn’t have one of his monster games as the 76ers’ Joel Embiid and his flock of hot-shooting guards survived in a 105-98 Christmas upset in the nationally televised Garden matinee. Porzingis racked...