MARBLEHEAD – Marblehead football coach Doug Chernovetz has been suspended by the Massachusetts Interscholastic Athletic Association for using chewing tobacco in front of his players, athletic director Mike Plansky confirmed last night.Chernovetz will miss the first two games of the season this fall.The issue first came to light last last year, Plansky said. It was reported to the MIAA, and the association made its ruling “which we support 100 percent,” Plansky said.It was unclear who would coach the team in his absence.The Magicians went 4-7 this past fall, with wins over Salem, Danvers, Revere and Ipswich. But they fell to Beverly and Saugus, and lost on Thanksgiving to Swampscott.