This is a general cleanup of things like code style issues and code structure of the STM32w port to make it more like the rest of Contiki is structured.
- Structural modification of RPL data storage.
- Support multiple gateways (multiple DODAG-ID with a unique InstanceID)
- Use Lollipop counters
- Add leaf-only configuration option for RPL
Bugfix :
- Correctly send "Grounded" flag in DIO