ipvs: fixed sparse warning

Removed the following sparse warnings, wether CONFIG_SYSCTL
is defined or not:
* warning: symbol 'ip_vs_control_net_init_sysctl' was not
declared. Should it be static?
* warning: symbol 'ip_vs_control_net_cleanup_sysctl' was
not declared. Should it be static?

Signed-off-by: Claudiu Ghioc <[e-mail]>
Signed-off-by: Simon Horman <[e-mail]>

net/netfilter/ipvs/ip_vs_ctl.c

···
  * per netns intit/exit func.
  */
 #ifdef CONFIG_SYSCTL
-int __net_init ip_vs_control_net_init_sysctl(struct net *net)
+static int __net_init ip_vs_control_net_init_sysctl(struct net *net)
 {
 	int idx;
 	struct netns_ipvs *ipvs = net_ipvs(net);
···
 	return 0;
 }
 
-void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net)
+static void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net)
 {
 	struct netns_ipvs *ipvs = net_ipvs(net);
 
···
 
 #else
 
-int __net_init ip_vs_control_net_init_sysctl(struct net *net) { return 0; }
-void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net) { }
+static int __net_init ip_vs_control_net_init_sysctl(struct net *net) { return 0; }
+static void __net_exit ip_vs_control_net_cleanup_sysctl(struct net *net) { }
 
 #endif