team: make team_mode struct const

Signed-off-by: Jiri Pirko <jpirko@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/team/team_mode_roundrobin.c b/drivers/net/team/team_mode_roundrobin.c
index 6abfbdc..daafca2 100644
--- a/drivers/net/team/team_mode_roundrobin.c
+++ b/drivers/net/team/team_mode_roundrobin.c
@@ -81,7 +81,7 @@
 	.port_change_mac	= rr_port_change_mac,
 };
 
-static struct team_mode rr_mode = {
+static const struct team_mode rr_mode = {
 	.kind		= "roundrobin",
 	.owner		= THIS_MODULE,
 	.priv_size	= sizeof(struct rr_priv),