NXP Semiconductors NV and a Taiwan Semiconductor Manufacturing Co. affiliate are discussing an expansion of their $7.8 billion Singapore venture, recognizing a need to diversify chip production in anticipation of growing US-Chinese tensions over technology.The Dutch firm and its Taiwanese partner Vanguard International Semiconductor Corp. on Wednesday broke ground on a joint chip plant in Singapore’s east. The partners are already working on a phase two expansion, NXP Executive Vice President An...