qeth: fix usage of netdev_ops

Have separate netdev_ops for OSA and HiperSocket/TR.

Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/s390/net/qeth_l2_main.c

diff --git a/drivers/s390/net/qeth_l2_main.c b/drivers/s390/net/qeth_l2_main.c
index c4f1b04..07ab8a5 100644
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -916,7 +916,7 @@
 	.get_drvinfo = qeth_core_get_drvinfo,
 };
 
-static struct net_device_ops qeth_l2_netdev_ops = {
+static const struct net_device_ops qeth_l2_netdev_ops = {
 	.ndo_open		= qeth_l2_open,
 	.ndo_stop		= qeth_l2_stop,
 	.ndo_get_stats		= qeth_get_stats,