TOM Cruise and Sumner Redstone are settling their differences and getting ready to work together again. Redstone, the cantankerous head of Viacom and CBS, fired Cruise two years ago after Cruise jumped on Oprah Winfrey’s couch to demonstrate his love for Katie Holmes and then went on “Today” to promote “Mission: Impossible III,” but instead went on a tirade against prescription drugs. But the two had lunch yesterday at the Polo Lounge in the Beverly Hills Hotel, one of LA’s most public places for a rapprochement. “Tom is missing Paramount. He needs a hit,” explained one Angeleno.