can: gs_usb: gs_make_candev(): set netdev->dev_id

The gs_usb driver supports USB devices with more than 1 CAN channel.
Set the "netdev->dev_id" to distinguish between channels in user
space.

Link: https://lore.kernel.org/all/20221007075418.213403-1-mkl@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/usb/gs_usb.c

@@ -1153,6 +1153,7 @@ static struct gs_can *gs_make_candev(unsigned int channel,
 	netdev->ethtool_ops = &gs_usb_ethtool_ops;
 
 	netdev->flags |= IFF_ECHO; /* we support full roundtrip echo */
+	netdev->dev_id = channel;
 
 	/* dev setup */
 	strcpy(dev->bt_const.name, KBUILD_MODNAME);