bridge: netlink: add support for default_pvid

Add IFLA_BR_VLAN_DEFAULT_PVID to allow setting/getting bridge's
default_pvid via netlink.

Signed-off-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/uapi/linux/if_link.h b/include/uapi/linux/if_link.h
index 0200bed..c5b15bf 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -262,6 +262,7 @@
 	IFLA_BR_NF_CALL_IPTABLES,
 	IFLA_BR_NF_CALL_IP6TABLES,
 	IFLA_BR_NF_CALL_ARPTABLES,
+	IFLA_BR_VLAN_DEFAULT_PVID,
 	__IFLA_BR_MAX,
 };