can: rh850 support for CAN FD

This change enables dual mode for CAN raw frames
and also CAN FD for property transfer with up to
64 bytes payload for both transmit and receive.

Change-Id: I4bc337df61065b35db534ee51790101bade22e1d
CRs-Fixed: 1058981
Signed-off-by: Sergio Frades Ruiz De Sola <csfrade@codeaurora.org>