vlan: change return type of vlan_proc_rem_dev

Since function vlan_proc_rem_dev() will only return 0, it's better to
return void instead of int.

Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/8021q/vlanproc.h b/net/8021q/vlanproc.h
index 063f60a..8838a2e 100644
--- a/net/8021q/vlanproc.h
+++ b/net/8021q/vlanproc.h
@@ -5,7 +5,7 @@
 struct net;
 
 int vlan_proc_init(struct net *net);
-int vlan_proc_rem_dev(struct net_device *vlandev);
+void vlan_proc_rem_dev(struct net_device *vlandev);
 int vlan_proc_add_dev(struct net_device *vlandev);
 void vlan_proc_cleanup(struct net *net);
 
@@ -14,7 +14,7 @@
 #define vlan_proc_init(net)	(0)
 #define vlan_proc_cleanup(net)	do {} while (0)
 #define vlan_proc_add_dev(dev)	({(void)(dev), 0; })
-#define vlan_proc_rem_dev(dev)	({(void)(dev), 0; })
+#define vlan_proc_rem_dev(dev)	do {} while (0)
 #endif
 
 #endif /* !(__BEN_VLAN_PROC_INC__) */