[IPSEC] Use XFRM_MSG_* instead of XFRM_SAP_*

This patch removes XFRM_SAP_* and converts them over to XFRM_MSG_*.
The netlink interface is meant to map directly onto the underlying
xfrm subsystem.  Therefore rather than using a new independent
representation for the events we can simply use the existing ones
from xfrm_user.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
diff --git a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
index e068bd7..2537f26 100644
--- a/net/xfrm/xfrm_state.c
+++ b/net/xfrm/xfrm_state.c
@@ -836,7 +836,7 @@
 	struct km_event c;
 
 	c.data.hard = hard;
-	c.event = XFRM_SAP_EXPIRED;
+	c.event = XFRM_MSG_EXPIRE;
 	km_state_notify(x, &c);
 
 	if (hard)
@@ -884,7 +884,7 @@
 	struct km_event c;
 
 	c.data.hard = hard;
-	c.event = XFRM_SAP_EXPIRED;
+	c.event = XFRM_MSG_POLEXPIRE;
 	km_policy_notify(pol, dir, &c);
 
 	if (hard)