sanitize linux/isdn_divertif.h for userspace

the isdn_divertif contains kernel-only references so I've wrapped them in
__KERNEL__ and add proper #include statements.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Cc: Karsten Keil <kkeil@suse.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/Kbuild

@@ -92,7 +92,6 @@ header-y += ip_mp_alg.h
 header-y += ipsec.h
 header-y += ipx.h
 header-y += irda.h
-header-y += isdn_divertif.h
 header-y += iso_fs.h
 header-y += ixjuser.h
 header-y += jffs2.h
@@ -242,6 +241,7 @@ unifdef-y += ipv6.h
 unifdef-y += ipv6_route.h
 unifdef-y += isdn.h
 unifdef-y += isdnif.h
+unifdef-y += isdn_divertif.h
 unifdef-y += isdn_ppp.h
 unifdef-y += isicom.h
 unifdef-y += jbd.h

include/linux/isdn_divertif.h

@@ -24,6 +24,10 @@
 #define DIVERT_REL_ERR  0x04  /* module not registered */
 #define DIVERT_REG_NAME isdn_register_divert
 
+#ifdef __KERNEL__
+#include <linux/isdnif.h>
+#include <linux/types.h>
+
 /***************************************************************/
 /* structure exchanging data between isdn hl and divert module */
 /***************************************************************/ 
@@ -40,3 +44,4 @@ typedef struct
 /* function register */
 /*********************/
 extern int DIVERT_REG_NAME(isdn_divert_if *);
+#endif