net: spread __net_init, __net_exit

__net_init/__net_exit are apparently not going away, so use them
to full extent.

In some cases __net_init was removed, because it was called from
__net_exit code.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/ipv6/af_inet6.c b/net/ipv6/af_inet6.c
index 12e69d3..e29160f 100644
--- a/net/ipv6/af_inet6.c
+++ b/net/ipv6/af_inet6.c
@@ -999,7 +999,7 @@
 	return -ENOMEM;
 }
 
-static void __net_exit ipv6_cleanup_mibs(struct net *net)
+static void ipv6_cleanup_mibs(struct net *net)
 {
 	snmp_mib_free((void **)net->mib.udp_stats_in6);
 	snmp_mib_free((void **)net->mib.udplite_stats_in6);
@@ -1042,7 +1042,7 @@
 #endif
 }
 
-static void inet6_net_exit(struct net *net)
+static void __net_exit inet6_net_exit(struct net *net)
 {
 #ifdef CONFIG_PROC_FS
 	udp6_proc_exit(net);