Dan PrimackIllustration: Sarah Grillo/AxiosPrivate equity firm TPG completed its $7.6 billion purchase of the 70% stake it didn't already hold in DirecTV from AT&T.Why it matters: AT&T is officially out of the media game, focused instead on connectivity.Catch up quick: TPG agreed to the deal last fall, concurrent to an announcement that DirecTV would buy Dish Network to form the country's largest pay-TV provider.But TPG's deal wasn't contingent on the Dish deal, which soon collapsed due to a fai...