Supplier TSMC is already preparing to start production of the A11 chip expected to land in Apple’s next round of iPhones, Chinese-language site Economic Daily News reports. The company is Apple’s sole supplier of the CPUs for its new devices, and is expected to begin building the components next month in order to reach 50 million units by July. Apple split its A9 chip orders between both Samsung and TSMC, but a number of reports claimed…