Added individual Kconfig for CAN and ORTE components.

Added individual Kconfig for CAN and ORTE components.
Work is based on the proposal and initial version done by Pierre.
The option names has been preserved from the previous Kconfig version.
This means, that compilation should work correctly with actual Kconfig
and with new one after upper level Kconfig changes.

IRQ manipulation changed to spin-locks for rest of boards
to support better RT-Linux.