Remove parameters from HAL

[andypugh]

Merge Rene "noparam" branch.
https://github.com/rene-dev/linuxcnc/tree/noparam

[BsAtHome]

The changeset includes wrong modification of parameters into HAL input pins. See f.ex. hm2_modbus.c. These parameters are R/O from other components and are output by the hm2_modbus component. Changing them to input pins is therefore the wrong direction.

This problem may also be (many) other places...

[andypugh]

Rene's branch is a work in progress, we created this issue to track it as a 2.10 requirement.

But, thanks for your analysis, please add any other things like this that you spot.