s390/qeth: don't offer .ndo_bridge_* ops for OSA devices

qeth_l2_detect_dev2br_support() will only set brport_hw_features for IQD
devices. So qeth_l2_bridge_getlink() and qeth_l2_bridge_setlink() will
always return -EOPNOTSUPP on OSA devices. Just don't offer these
callbacks instead.
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: Alexandra Winter <wintera@linux.ibm.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/s390/net/qeth_l2_main.c

@@ -1091,8 +1091,6 @@ static const struct net_device_ops qeth_l2_osa_netdev_ops = {
 	.ndo_tx_timeout		= qeth_tx_timeout,
 	.ndo_fix_features	= qeth_fix_features,
 	.ndo_set_features	= qeth_set_features,
-	.ndo_bridge_getlink	= qeth_l2_bridge_getlink,
-	.ndo_bridge_setlink	= qeth_l2_bridge_setlink,
 };
 
 static int qeth_l2_setup_netdev(struct qeth_card *card)