From: Cornelia Huck <cohuck@de.ibm.com>

common i/o layer changes:

 - Cope with changed cdev->handler.
 - Split clearing of subchannels from reipl function and declare it in header.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>