net: use __be16 instead of u16 for the userspace code

Signed-off-by: Changli Gao <xiaosuo@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/if_pppox.h

@@ -50,7 +50,7 @@ struct pppoe_addr {
  * PPTP addressing definition
  */
 struct pptp_addr {
-	u16             call_id;
+	__be16		call_id;
 	struct in_addr	sin_addr;
 };