scsi: add scsi-defs.h Largely based on <scsi/scsi.h> from linux. Added into the tree so we can use the defines everywhere, not just in scsi-generic.c (which is linux-specific). Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>