s390/sclp: Add SCLP character device driver

Add a character misc device "sclp_ctl" that allows to run SCCBs
from user space using the SCLP_CTL_SCCB ioctl.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt
index 237acab..2a5f0e1 100644
--- a/Documentation/ioctl/ioctl-number.txt
+++ b/Documentation/ioctl/ioctl-number.txt
@@ -72,6 +72,7 @@
 0x06	all	linux/lp.h
 0x09	all	linux/raid/md_u.h
 0x10	00-0F	drivers/char/s390/vmcp.h
+0x10	10-1F	arch/s390/include/uapi/sclp_ctl.h
 0x12	all	linux/fs.h
 		linux/blkpg.h
 0x1b	all	InfiniBand Subsystem	<http://infiniband.sourceforge.net/>