The Atlanta Falcons have been fighting a losing battle against the salary cap for several years, but that won’t be the case this offseason when the team is projected to have over $56 million in cap space. That number will go up another $12 million if the Falcons release quarterback Marcus Mariota, as many expect them to do. But while the team will have plenty of cap space, Atlanta has several positions to address this offseason. Whether it’s finding a No. 2 wide receiver, addressing the defensive line or potentially replacing right tackle Kaleb McGary, the Falcons have a lot…