bond: make slave_sysfs_ops static

Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/bonding/bond_sysfs_slave.c

@@ -102,7 +102,7 @@ static ssize_t slave_show(struct kobject *kobj,
 	return slave_attr->show(slave, buf);
 }
 
-const struct sysfs_ops slave_sysfs_ops = {
+static const struct sysfs_ops slave_sysfs_ops = {
 	.show = slave_show,
 };