[IPSEC]: Replace x->type->{local,remote}_addr with flags

The functions local_addr and remote_addr are more than what they're
needed for.  The same thing can be done easily with flags on the type
object.  This patch does that and simplifies the wrapper functions in
xfrm6_policy accordingly.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/net/xfrm.h b/include/net/xfrm.h
index 1dd20cf..3434fdc 100644
--- a/include/net/xfrm.h
+++ b/include/net/xfrm.h
@@ -282,6 +282,8 @@
 	__u8			flags;
 #define XFRM_TYPE_NON_FRAGMENT	1
 #define XFRM_TYPE_REPLAY_PROT	2
+#define XFRM_TYPE_LOCAL_COADDR	4
+#define XFRM_TYPE_REMOTE_COADDR	8
 
 	int			(*init_state)(struct xfrm_state *x);
 	void			(*destructor)(struct xfrm_state *);
@@ -289,8 +291,6 @@
 	int			(*output)(struct xfrm_state *, struct sk_buff *pskb);
 	int			(*reject)(struct xfrm_state *, struct sk_buff *, struct flowi *);
 	int			(*hdr_offset)(struct xfrm_state *, struct sk_buff *, u8 **);
-	xfrm_address_t		*(*local_addr)(struct xfrm_state *, xfrm_address_t *);
-	xfrm_address_t		*(*remote_addr)(struct xfrm_state *, xfrm_address_t *);
 	/* Estimate maximal size of result of transformation of a dgram */
 	u32			(*get_mtu)(struct xfrm_state *, int size);
 };