headers, net: Use __kernel_sa_family_t in more definitions shared with userland

Complete the work started with commit
6602a4baf4d1a73cc4685a39ef859e1c5ddf654c ('net: Make userland include
of netlink.h more sane').

Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/include/linux/x25.h b/include/linux/x25.h
index 6450a7f..810cce6 100644
--- a/include/linux/x25.h
+++ b/include/linux/x25.h
@@ -12,6 +12,7 @@
 #define	X25_KERNEL_H
 
 #include <linux/types.h>
+#include <linux/socket.h>
 
 #define	SIOCX25GSUBSCRIP	(SIOCPROTOPRIVATE + 0)
 #define	SIOCX25SSUBSCRIP	(SIOCPROTOPRIVATE + 1)
@@ -57,7 +58,7 @@
  *	Linux X.25 Address structure, used for bind, and connect mostly.
  */
 struct sockaddr_x25 {
-	sa_family_t	   sx25_family;		/* Must be AF_X25 */
+	__kernel_sa_family_t sx25_family;	/* Must be AF_X25 */
 	struct x25_address sx25_addr;		/* X.121 Address */
 };