Actuator Core: create seperate control modes based on flash config

[wocsor]

Actuator Core is a versatile piece of hardware for controlling motors. Given its flexible nature, it may be used in applications ranging from throttle, steering, or brake pedal control. Giving the user the option as to how to use their Actuator Core is important for their own implementations.

• add control mode setting to flash config (system config parameter)
• read in mode setting from flash config
• select control loop based on control mode
• select pre-defined CAN I/O message and structure based on mode
• move current controls into a new loop

[wocsor]

implemented in eee8028
needs to be tested

[wocsor]

modes now respect universal flash settings regarding motor polarity and channel. this will help with hardware/software configuration on install