net: fib_notifier: Add temporary events to the FIB notification chain

Subsequent patches are going to simplify the IPv4 route offload API,
which will only use two events - replace and delete.

Introduce a temporary version of these two events in order to make the
conversion easier to review.
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Reviewed-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/net/fib_notifier.h

@@ -23,6 +23,8 @@ enum fib_event_type {
 	FIB_EVENT_NH_DEL,
 	FIB_EVENT_VIF_ADD,
 	FIB_EVENT_VIF_DEL,
+	FIB_EVENT_ENTRY_REPLACE_TMP,
+	FIB_EVENT_ENTRY_DEL_TMP,
 };
 
 struct fib_notifier_ops {