By Wilton Jackson The Raptors assistant was determined to not miss the biggest game of his son’s life. Raptors assistant Adrian Griffin is typically bogged down with aiding coach Nick Nurse on how to get fifth-place Toronto a win on the court. But with the Raptors gearing up for pivotal matchup against the Heat on Sunday, Griffin’s attention will instead be on the biggest game of his son’s life. Griffin is the father of Duke freshman forward AJ Griffin, who is preparing to play against the program’s Tobacco Road rival North Carolina in the Final Four at 8:49 ET Saturday in New Orleans. However…