I also have this message.NX-OS is :
n3500-uk9-kickstart.6.0.2.A6.7.bin6.0(2)A6(7)
%KERN-3-SYSTEM_MSG: [3529786.023814] neutron_usd_uc/3530 - No matching bus/addr for dev NUOVA_I2C_DF410 inst 255 - kernel
%KERN-3-SYSTEM_MSG: [3529786.023818] get_bus_...