by Paul Teetor The gold and cardinal USC banners came out of deep storage Sunday afternoon, and started flying all over the beach cities. Whether they were hanging from a showy over-priced multi-million-dollar mega-mansion, a boxy concrete duplex carved up into a rat-hole megaplex, or a run-down sea shack eyesore – yes, there are still a few – the message was the same: We’re back, baby. Meanwhile crowds of delirious Trojan fans were dancing in the Coliseum Sunday night, just…