[XFRM]: struct xfrm_usersa_id annotations

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/xfrm.h

@@ -281,7 +281,7 @@ struct xfrm_usersa_info {
 
 struct xfrm_usersa_id {
 	xfrm_address_t			daddr;
-	__u32				spi;
+	__be32				spi;
 	__u16				family;
 	__u8				proto;
 };