ax.25: Update to register_net_sysctl_sz

Move from register_net_sysctl to register_net_sysctl_sz and pass the
ARRAY_SIZE of the ctl_table array that was used to create the table
variable. We need to move to the new function in preparation for when we
change SIZE_MAX to ARRAY_SIZE() in the register_net_sysctl macro.
Failing to do so would erroneously allow ARRAY_SIZE() to be called on a
pointer. We hold off the SIZE_MAX to ARRAY_SIZE change until we have
migrated all the relevant net sysctl registering functions to
register_net_sysctl_sz in subsequent commits.
Signed-off-by: Joel Granados <j.granados@samsung.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>

net/ax25/sysctl_net_ax25.c

@@ -159,7 +159,8 @@ int ax25_register_dev_sysctl(ax25_dev *ax25_dev)
 		table[k].data = &ax25_dev->values[k];
 
 	snprintf(path, sizeof(path), "net/ax25/%s", ax25_dev->dev->name);
-	ax25_dev->sysheader = register_net_sysctl(&init_net, path, table);
+	ax25_dev->sysheader = register_net_sysctl_sz(&init_net, path, table,
+						     ARRAY_SIZE(ax25_param_table));
 	if (!ax25_dev->sysheader) {
 		kfree(table);
 		return -ENOMEM;