net: openswitch: reuse the helper variable to improve the code readablity

In the function ovs_ct_limit_exit, there is already a helper vaibale
which could be reused to improve the readability, so i fix it in this
patch.
Signed-off-by: Zeng Tao <prime.zeng@hisilicon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

net/openvswitch/conntrack.c

@@ -1901,8 +1901,8 @@ static void ovs_ct_limit_exit(struct net *net, struct ovs_net *ovs_net)
 					 lockdep_ovsl_is_held())
 			kfree_rcu(ct_limit, rcu);
 	}
-	kfree(ovs_net->ct_limit_info->limits);
-	kfree(ovs_net->ct_limit_info);
+	kfree(info->limits);
+	kfree(info);
 }
 
 static struct sk_buff *