The FCC just approved SpaceX paying $17 billion for 65 MHz of EchoStar's spectrum. That ends a 17-year poker hand and kills America's fourth wireless carrier in the same press release. Charlie Ergen, a professional poker player turned satellite-TV billionaire, spent two decades accumulating wireless spectrum. The 2020 T-Mobile/Sprint merger locked Dish into a buildout obligation, the consolation prize for letting American wireless drop from four carriers to three. Dish got Boost Mobile. Ergen…