* REFACTOR: moving timer definitions to MCU locations.
* Now that the MCU directory needs to be included in the search path for includes, no need for target.h entry if filenaming is consistent.
* SITL needs the empty include.
As targets are limited to MCU now, we can use this fact to remove the #ifdef statements related to MCU. This is implied by the target.h and can be used for including MCU platform specific includes.
