Investment bank Morgan Stanley has raised its price target on Apple stock from $185 to $210, based on expectations of doubled iPhone sales in calendar year 2009. “We believe the market generally expects a doubling of iPhone units with the lower price point ($199) and we believe this is realistic, if not conservative,” the firm said in a note. It expects sales of 27 million iPhones in 2009, with an average revenue of $550 per unit. Finally,…