lib/kobject_uevent.c: fix CONIG_NET=n warning

lib/kobject_uevent.c:87: warning: 'kobj_bcast_filter' defined but not used

Repairs "hotplug: netns aware uevent_helper"

Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

lib/kobject_uevent.c

@@ -83,6 +83,7 @@ out:
 	return ret;
 }
 
+#ifdef CONFIG_NET
 static int kobj_bcast_filter(struct sock *dsk, struct sk_buff *skb, void *data)
 {
 	struct kobject *kobj = data;
@@ -98,6 +99,7 @@ static int kobj_bcast_filter(struct sock *dsk, struct sk_buff *skb, void *data)
 
 	return 0;
 }
+#endif
 
 static int kobj_usermode_filter(struct kobject *kobj)
 {