live-build/ubuntu-cpc/hooks.d/base/disk-image.binary: Do not call force_boot_without_initramfs on s390x.

debian/changelog

@@ -4,6 +4,8 @@ livecd-rootfs (23.10.6) UNRELEASED; urgency=medium
     force_boot_without_initramfs to pass "mountpoint" and not "${mountpoint}"
     (which actually worked on most arches for VERY BAD reasons but fails on
     s390x).
+  * live-build/ubuntu-cpc/hooks.d/base/disk-image.binary: Do not call
+    force_boot_without_initramfs on s390x.
 
  -- Michael Hudson-Doyle <michael.hudson@ubuntu.com>  Fri, 28 Jul 2023 14:40:13 +1200
 

live-build/ubuntu-cpc/hooks.d/base/disk-image-uefi.binary

@@ -127,7 +127,7 @@ install_grub() {
     fi
 
     # Use initrdless boot for minimal images
-    if [ "${SUBPROJECT:-}" = "minimized" ]; then
+    if [ "${SUBPROJECT:-}" = "minimized" ] && [ "$ARCH" != "s390x" ]; then
         force_boot_without_initramfs mountpoint
     fi