core/linux-raspberrypi-latest add CAN support

This patch enables support for the CAN Bus in general and a variety of CAN Interfaces. This isn't the default for desktop kernels in Archlinux. But IMO this should be enabled for devices like the raspberrypi (or similar small ARM Boards), as the CAN Bus is widespread in embedded systems.

The additional modules enable devices like the Canberry (see http://www.industrialberry.com/canberry-v-1-1/).

Similar patches would apply to kernels of other devices, but I only have the raspberrypi.