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/phonet/pn_dev.c b/net/phonet/pn_dev.c
index bc4a33b..c597cc5 100644
--- a/net/phonet/pn_dev.c
+++ b/net/phonet/pn_dev.c
@@ -311,7 +311,7 @@
 };
 
 /* Per-namespace Phonet devices handling */
-static int phonet_init_net(struct net *net)
+static int __net_init phonet_init_net(struct net *net)
 {
 	struct phonet_net *pnn = net_generic(net, phonet_net_id);
 
@@ -324,7 +324,7 @@
 	return 0;
 }
 
-static void phonet_exit_net(struct net *net)
+static void __net_exit phonet_exit_net(struct net *net)
 {
 	struct phonet_net *pnn = net_generic(net, phonet_net_id);
 	struct net_device *dev;