Unify spelling of CAN Flexible Data-rate abbreviation to "CAN FD" instead
of "CAN-FD". The former aligns with the CAN in Automation (CiA)
recommendation.
Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
Move the documentation for high-level CAN protocols (for now only covering
ISO-TP) from the peripherals section to the connectivity section.
This matches the layout in code, where the CAN controllers are under the
drivers/can directory and the protocols are under the subsys/canbus/
directory.
Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>