can: kvaser_pciefd: Store device channel index

Store device channel index in netdev.dev_port.

Fixes: 26ad340e ("can: kvaser_pciefd: Add driver for Kvaser PCIEcan devices")
Reviewed-by: Vincent Mailhol <mailhol.vincent@wanadoo.fr>
Signed-off-by: Jimmy Assarsson <extja@kvaser.com>
Link: https://patch.msgid.link/20250725123230.8-6-extja@kvaser.com


Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>