netdevice: add DEFINE_FREE() for dev_put

For short netdev holds within a function there are still a lot of
users of dev_put() rather than netdev_put(). Add DEFINE_FREE() to
allow making those safer.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/netdevice.h

@@ -4097,6 +4097,8 @@ static inline void dev_put(struct net_device *dev)
 	netdev_put(dev, NULL);
 }
 
+DEFINE_FREE(dev_put, struct net_device *, if (_T) dev_put(_T))
+
 static inline void netdev_ref_replace(struct net_device *odev,
 				      struct net_device *ndev,
 				      netdevice_tracker *tracker,