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This is a preparation commit to enable a global usage of the TTC instance of the timer tick (e.g. in the adjtimex code).

- Replaced stdlib.h with stddef.h
- Moved drivers to toki-hal-port
- Added dependency to toki-libc-headers and toki-perfmon

To handle the case of CAN messages received on the bus before CAN port is opened.

- Splitted the code into an  architecture specific and a generic part
- Changed naming and formatting to follow the FreeRTOS code style guides
- Implemented a uxHalGetCpuId() method to "universally" provide the information about the core the software is runnign on

Tick interrupt initialization was adapted to to calculate a Hardware
Timer based on the current core.

- Marked all port specific default hooks as weak symbol (was only missing for the ARM CA53 port)
- Added a toki specific idle hook (placeholder) that can be replaced by an application specific one

+ fix some bugs.