[chibios] Fixes after merging with the master branch, so now it compilles.

 [chibios] Fixes after merging with the master branch, so now it compilles.

* defined CHIBIOS_INFO message and added into default_rotorcraft telemetry
* i2c/uart_pprz.c files updated
* arch dependend chibios files updated to work with F4 boards
* some makefiles updated to define correct uart ports with Chibios
* rt example changed to lia f4
* minor tidy up in the comments