[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>

include/net/xfrm.h

@@ -158,18 +158,6 @@ enum {
 	XFRM_STATE_DEAD
 };
 
-/* events that could be sent by kernel */
-enum {
-	XFRM_SAP_INVALID,
-	XFRM_SAP_EXPIRED,
-	XFRM_SAP_ADDED,
-	XFRM_SAP_UPDATED,
-	XFRM_SAP_DELETED,
-	XFRM_SAP_FLUSHED,
-	__XFRM_SAP_MAX
-};
-#define XFRM_SAP_MAX (__XFRM_SAP_MAX - 1)
-
 /* callback structure passed from either netlink or pfkey */
 struct km_event
 {