bridge: netlink: add support for igmp's intervals

Add support to set/get all of the igmp's configurable intervals via
netlink. These currently are:
IFLA_BR_MCAST_LAST_MEMBER_INTVL
IFLA_BR_MCAST_MEMBERSHIP_INTVL
IFLA_BR_MCAST_QUERIER_INTVL
IFLA_BR_MCAST_QUERY_INTVL
IFLA_BR_MCAST_QUERY_RESPONSE_INTVL
IFLA_BR_MCAST_STARTUP_QUERY_INTVL

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 fd841b5..b8c88aa 100644
--- a/include/uapi/linux/if_link.h
+++ b/include/uapi/linux/if_link.h
@@ -253,6 +253,12 @@
 	IFLA_BR_MCAST_HASH_MAX,
 	IFLA_BR_MCAST_LAST_MEMBER_CNT,
 	IFLA_BR_MCAST_STARTUP_QUERY_CNT,
+	IFLA_BR_MCAST_LAST_MEMBER_INTVL,
+	IFLA_BR_MCAST_MEMBERSHIP_INTVL,
+	IFLA_BR_MCAST_QUERIER_INTVL,
+	IFLA_BR_MCAST_QUERY_INTVL,
+	IFLA_BR_MCAST_QUERY_RESPONSE_INTVL,
+	IFLA_BR_MCAST_STARTUP_QUERY_INTVL,
 	__IFLA_BR_MAX,
 };