[S390] chsc headers userspace cleanup

Kernel headers shouldn't expose functions to userspace.

Cc: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/include/asm-s390/chpid.h b/include/asm-s390/chpid.h
index 606844d..dfe3c7f 100644
--- a/include/asm-s390/chpid.h
+++ b/include/asm-s390/chpid.h
@@ -20,6 +20,9 @@
 	u8 id;
 } __attribute__((packed));
 
+#ifdef __KERNEL__
+#include <asm/cio.h>
+
 static inline void chp_id_init(struct chp_id *chpid)
 {
 	memset(chpid, 0, sizeof(struct chp_id));
@@ -40,9 +43,6 @@
 	}
 }
 
-#ifdef __KERNEL__
-#include <asm/cio.h>
-
 static inline int chp_id_is_valid(struct chp_id *chpid)
 {
 	return (chpid->cssid <= __MAX_CSSID);