Tesla Motors Inc. has hired former Burberry senior vice president Ganesh Srivats, adding a sales executive to help the electric-car maker extend its reputation for automotive luxury to an increasingly global audience. Srivats, whose position as vice president for North American sales was confirmed Thursday by the company, will help Tesla deepen its already formidable brand into a premium lifestyle experience to go with its high-tech image, taking a cue from the kind of marketing BMW, Porsche and Ferrari have done.