Dec 9 (Reuters) - Ford Motor has stopped taking reservations for the upcoming F-150 Lightning electric pickup, Chief Executive Jim Farley told CNBC host Jim Cramer on Thursday. Farley said F-150 Lightning orders were capped at 200,000: "We had to stop taking reservations because we had so many."He said Ford originally installed production capacity for 70,000-80,000 Lightnings a year, and now aims to double that over next two years. "We don"t want to build these vehicles in tents," Farley joked, in a reference to Tesla CEO Elon Musk"s decision to expand production several years ago by adding a tent to the company"s Fremont plant. We want to build them at the Rouge" factory near Ford"s headquarters in Dearborn, Michigan.