By Fanny Potkin SINGAPORE (Reuters) -Nvidia is working closely with the U.S. government to ensure new chips for the Chinese market are compliant with export curbs, CEO Jensen Huang said on Wednesday. The California-based artificial intelligence chip designer has commanded more than 90% share of China’s $7 billion AI chip market, but analysts have said new U.S. curbs on chip exports are likely to create opportunities for Chinese rivals to make inroads. Reuters last month reported Nvidia had told customers in China it was delaying the launch of a new China-focused AI chip until the first quarter…