Fix port on/off command bits

[ThirteenFish]

They are currently implemented as a bit field where bit 1 corresponds to port 1, and so on. As a result we have no way to set port 8, but at current this is OK because port 8 is non-functional in hardware. It may not be in the distant future though.

To fix this bit 0 should correspond to port 1, ... bit 7 to port 8. This change needs to be made at the same time as the change in the RNH page in fc-test

[ThirteenFish]

fixed in 89ffc2f