[IPV4]: encapsulation annotations

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/xfrm.h b/include/linux/xfrm.h
index 8ae7f74..7907c42 100644
--- a/include/linux/xfrm.h
+++ b/include/linux/xfrm.h
@@ -211,8 +211,8 @@
 
 struct xfrm_encap_tmpl {
 	__u16		encap_type;
-	__u16		encap_sport;
-	__u16		encap_dport;
+	__be16		encap_sport;
+	__be16		encap_dport;
 	xfrm_address_t	encap_oa;
 };