A relative unknown has been tapped to provide the sex and drugs Lindsay Lohan can’t. Malin Akerman, whose biggest roles to date were in “Watchmen” and “The Heartbreak Kid,” will take over the role of Linda Lovelace in the new biopic about the “Deep Throat” porn star, according to Deadline Hollywood. As The Post reported Sunday, Lohan was booted from the film, “Inferno,” because she was unreliable and uninsurable, director Matthew Wilder said.