Updates for ARKFPV board to use Cyphal-CAN-FD#1

Draft

jwwaite wants to merge 3 commits intomainfrom arkfpv_cyphal

+28-3

Commits on Jan 5, 2025

changes for ARKFPV board to use Cyphal-CAN
jwwaite
committed

Commits on Jan 6, 2025

Added CONFIG_NET_CAN_EXTID
jwwaite
committed

Commits on Jan 7, 2025

Lowered data rate to 1 Mbps, works OK
jwwaite
committed