Steven Spielberg said he only agreed to start DreamWorks if it would be a 9-to-5 job.David Becker/Getty Images for CinemaConSteven Spielberg, 79, said his wife made one request before he started DreamWorks.The job had to function like a 9-to-5 role, with Spielberg home in time for dinner with his kids."It's going to be a real time drain for me, and I need to be with my family," Spielberg said.Steven Spielberg, 79, said he only agreed to start Dr…