[IPSEC]: Kill unused decap state structure

This patch removes the *_decap_state structures which were previously
used to share state between input/post_input.  This is no longer
needed.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/net/xfrm/xfrm_input.c b/net/xfrm/xfrm_input.c
index 2407a70..b549710 100644
--- a/net/xfrm/xfrm_input.c
+++ b/net/xfrm/xfrm_input.c
@@ -18,7 +18,7 @@
 {
 	int i;
 	for (i = 0; i < sp->len; i++)
-		xfrm_state_put(sp->x[i].xvec);
+		xfrm_state_put(sp->xvec[i]);
 	kmem_cache_free(secpath_cachep, sp);
 }
 EXPORT_SYMBOL(__secpath_destroy);
@@ -37,7 +37,7 @@
 
 		memcpy(sp, src, sizeof(*sp));
 		for (i = 0; i < sp->len; i++)
-			xfrm_state_hold(sp->x[i].xvec);
+			xfrm_state_hold(sp->xvec[i]);
 	}
 	atomic_set(&sp->refcnt, 1);
 	return sp;