pc-bios/s390-ccw.img: update image for stable

Contains the following commits:
- s390: Do not pass inofficial IPL type to the guest
- s390-ccw: force diag 308 subcode to unsigned long
- pc-bios/s390-ccw: struct tpi_info must be declared as aligned(4)

Signed-off-by: Cornelia Huck <cohuck@redhat.com>