Move MCP23016 to different I2C interface
MCP23016 on the same I2C interface as I2C MUX can cause I2C address conflict if some chip on FMC or RTM card will have the same address as MCP23016. Chip could be moved to interface on pins P0[10] and P0[11] if it will be disconnected from FPGA_I2C MUX as mentioned in #53 (comment 116889). The other solution would be to connect it to I2CMUX2 port which is currently not used. The other issue with MCP23016 is that SCL pin on chip is connected to SDA line.