bridge: Fix flushing of dynamic FDB entries

The following commands should result in all the dynamic FDB entries
being flushed, but instead all the non-local (non-permanent) entries are
flushed:

 # bridge fdb add 00:aa:bb:cc:dd:ee dev dummy1 master static
 # bridge fdb add 00:11:22:33:44:55 dev dummy1 master dynamic
 # ip link set dev br0 type bridge fdb_flush
 # bridge fdb show brport dummy1
 00:00:00:00:00:01 master br0 permanent
 33:33:00:00:00:01 self permanent
 01:00:5e:00:00:01 self permanent

This is because br_fdb_flush() works with FDB flags and not the
corresponding enumerator values. Fix by passing the FDB flag instead.

After the fix:

 # bridge fdb add 00:aa:bb:cc:dd:ee dev dummy1 master static
 # bridge fdb add 00:11:22:33:44:55 dev dummy1 master dynamic
 # ip link set dev br0 type bridge fdb_flush
 # bridge fdb show brport dummy1
 00:aa:bb:cc:dd:ee master br0 static
 00:00:00:00:00:01 master br0 permanent
 33:33:00:00:00:01 self permanent
 01:00:5e:00:00:01 self permanent

Fixes: 1f78ee1 ("net: bridge: fdb: add support for fine-grained flushing")
Signed-off-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Link: https://lore.kernel.org/r/20221101185753.2120691-1-idosch@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

net/bridge/br_netlink.c

@@ -1332,7 +1332,7 @@ static int br_changelink(struct net_device *brdev, struct nlattr *tb[],
 
 	if (data[IFLA_BR_FDB_FLUSH]) {
 		struct net_bridge_fdb_flush_desc desc = {
-			.flags_mask = BR_FDB_STATIC
+			.flags_mask = BIT(BR_FDB_STATIC)
 		};
 
 		br_fdb_flush(br, &desc);

net/bridge/br_sysfs_br.c

@@ -345,7 +345,7 @@ static int set_flush(struct net_bridge *br, unsigned long val,
 		     struct netlink_ext_ack *extack)
 {
 	struct net_bridge_fdb_flush_desc desc = {
-		.flags_mask = BR_FDB_STATIC
+		.flags_mask = BIT(BR_FDB_STATIC)
 	};
 
 	br_fdb_flush(br, &desc);