Workaround for KnCMiner November batch

There is a bug in FPGA firmware that cause I2C hang. 
- One possible workaround is to wait after every I2C access to Ericsson DCDC module. This works around partially works but still cause hang about once every 24 hours.
- A more radical workaround is to just remove all I2C acces to Ericsson DCDC module. By doing this you cannot monitor Voltage from bfgminer but everything else works. So far this workaround completlly fix/hide the issue. No I2C hang for the last 6 days.