net: move and rename netif_notify_peers()

I believe net/core/dev.c is a better place for netif_notify_peers(),
because other net event notify functions also stay in this file.

And rename it to netdev_notify_peers().

Cc: David S. Miller <davem@davemloft.net>
Cc: Ian Campbell <Ian.Campbell@citrix.com>
Signed-off-by: Cong Wang <amwang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/netdevice.h b/include/linux/netdevice.h
index a9db4f3..8d4b731 100644
--- a/include/linux/netdevice.h
+++ b/include/linux/netdevice.h
@@ -2246,8 +2246,6 @@
 
 extern void netif_carrier_off(struct net_device *dev);
 
-extern void netif_notify_peers(struct net_device *dev);
-
 /**
  *	netif_dormant_on - mark device as dormant.
  *	@dev: network device
@@ -2596,6 +2594,7 @@
 extern int		dev_set_promiscuity(struct net_device *dev, int inc);
 extern int		dev_set_allmulti(struct net_device *dev, int inc);
 extern void		netdev_state_change(struct net_device *dev);
+extern void		netdev_notify_peers(struct net_device *dev);
 extern int		netdev_bonding_change(struct net_device *dev,
 					      unsigned long event);
 extern void		netdev_features_change(struct net_device *dev);