Some investors in gaming stalwart Nintendo are growing increasingly concerned with its strategy for the future and are calling for the company to consider smartphone platforms such as iOS as an alternative source of revenue, according to a Bloomberg report. The report states that the company’s most recent handheld gaming system, the 3DS, has been a flop thus far, prompting price cuts of 40 percent in Japan and 32 percent in the U.S. and a 82…