can: ifi: Treat CAN_CTRLMODE_FD_NON_ISO correctly

The CAN_CTRLMODE_FD flag is set for both ISO and BOSCH CANFD mode,
while the CAN_CTRLMODE_FD_NON_ISO is additional flag which is only
set for CANFD-BOSCH mode. Fix the handling of the flags to reflect
this.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Marc Kleine-Budde <mkl@pengutronix.de>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Oliver Hartkopp <socketcan@hartkopp.net>
Cc: Wolfgang Grandegger <wg@grandegger.com>
Reviewed-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

drivers/net/can/ifi_canfd/ifi_canfd.c

@@ -644,10 +644,11 @@ static void ifi_canfd_start(struct net_device *ndev)
 	if (priv->can.ctrlmode & CAN_CTRLMODE_LOOPBACK)
 		stcmd |= IFI_CANFD_STCMD_LOOPBACK;
 
-	if (priv->can.ctrlmode & CAN_CTRLMODE_FD)
+	if ((priv->can.ctrlmode & CAN_CTRLMODE_FD) &&
+	    !(priv->can.ctrlmode & CAN_CTRLMODE_FD_NON_ISO))
 		stcmd |= IFI_CANFD_STCMD_ENABLE_ISO;
 
-	if (!(priv->can.ctrlmode & (CAN_CTRLMODE_FD | CAN_CTRLMODE_FD_NON_ISO)))
+	if (!(priv->can.ctrlmode & CAN_CTRLMODE_FD))
 		stcmd |= IFI_CANFD_STCMD_DISABLE_CANFD;
 
 	priv->can.state = CAN_STATE_ERROR_ACTIVE;