bridge: convert br_features_recompute() to ndo_fix_features

Note: netdev_update_features() needs only rtnl_lock as br->port_list
is only changed while holding it.

Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h
index e2a4034..54578f2 100644
--- a/net/bridge/br_private.h
+++ b/net/bridge/br_private.h
@@ -183,7 +183,6 @@
 	struct br_cpu_netstats __percpu *stats;
 	spinlock_t			hash_lock;
 	struct hlist_head		hash[BR_HASH_SIZE];
-	u32				feature_mask;
 #ifdef CONFIG_BRIDGE_NETFILTER
 	struct rtable 			fake_rtable;
 	bool				nf_call_iptables;
@@ -379,7 +378,7 @@
 extern int br_del_if(struct net_bridge *br,
 	      struct net_device *dev);
 extern int br_min_mtu(const struct net_bridge *br);
-extern void br_features_recompute(struct net_bridge *br);
+extern u32 br_features_recompute(struct net_bridge *br, u32 features);
 
 /* br_input.c */
 extern int br_handle_frame_finish(struct sk_buff *skb);