pc-bios: Update the s390 bios images with the recent changes

The startup code of the bios has slightly been changed, apart
from that, there should not be any functional changes this time.

Signed-off-by: Thomas Huth <thuth@redhat.com>
diff --git a/pc-bios/s390-ccw.img b/pc-bios/s390-ccw.img
index c9a5a21..f0d9ef6 100644
--- a/pc-bios/s390-ccw.img
+++ b/pc-bios/s390-ccw.img
Binary files differ
diff --git a/pc-bios/s390-netboot.img b/pc-bios/s390-netboot.img
index 682da24..6908e49 100644
--- a/pc-bios/s390-netboot.img
+++ b/pc-bios/s390-netboot.img
Binary files differ