ATLANTA (Reuters) – Chris "Mac Daddy" Kelly of the 1990s rap duo Kris Kross likely died of a drug overdose, police said on Thursday, a day after the 34-year-old was found unconscious at his Atlanta home. An autopsy was scheduled Thursday for Kelly, who gained fame as a young teen with the hit song "Jump." "Based on the information at the scene, we are concluding that it was a drug overdose," said Corporal Kay Lester, spokeswoman for the Fulton County Police Department. She declined to elaborate. …