[S390] cio: Add chsc subchannel driver.

This patch adds a driver for subchannels of type chsc.

A device /dev/chsc is created which may be used to issue ioctls to:
- obtain information about the machine's I/O configuration
- dynamically change the machine's I/O configuration via
  asynchronous chsc commands

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
diff --git a/include/asm-s390/Kbuild b/include/asm-s390/Kbuild
index 13c9805..09f3125 100644
--- a/include/asm-s390/Kbuild
+++ b/include/asm-s390/Kbuild
@@ -8,6 +8,9 @@
 header-y += vtoc.h
 header-y += zcrypt.h
 header-y += kvm.h
+header-y += schid.h
+header-y += chsc.h
 
 unifdef-y += cmb.h
 unifdef-y += debug.h
+unifdef-y += chpid.h