[LinuxBIOS] what is i2cmux2?

[Tom Sylla]

As part of Broadcom Blast, yhlu checked in a new i2c mux file,
i2cmux2. I see a one line addition:

     smbus_write_byte(dev, 0x03, 0); // all output

What is this for? Is required for the HT1000? or is it required for
the particular mux on the Blast platform? Can that answer be
documented somewhere? Is there a better way to do this than to
duplicate and stick on a '2'?

Thanks