pc-bios/s390-ccw: define loadparm length

Loadparm is defined by the s390 architecture to be 8 bytes
in length. Let's define this size in the s390-ccw bios.

Suggested-by: Laszlo Ersek <lersek@redhat.com>
Signed-off-by: Collin Walling <walling@linux.ibm.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
4 files changed