CI: Fix microcode loading on Xen 4.20

CONFIG_UCODE_SCAN_DEFAULT only exists in Xen 4.21.  In older versions of xen,
use ucode=scan on the command line.

Fixes: 690655a511 ("CI: Include microcode for x86 hardware jobs")
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>

automation/gitlab-ci/build.yaml

@@ -306,7 +306,6 @@ alpine-3.18-gcc-debug:
       CONFIG_ARGO=y
       CONFIG_UBSAN=y
       CONFIG_UBSAN_FATAL=y
-      CONFIG_UCODE_SCAN_DEFAULT=y
       CONFIG_XHCI=y
 
 debian-12-x86_64-gcc-debug:

automation/scripts/qubes-x86-64.sh

@@ -247,14 +247,14 @@ TFTP=/scratch/gitlab-runner/tftp
 CONTROLLER=control@thor.testnet
 
 echo "
-multiboot2 (http)/gitlab-ci/xen $CONSOLE_OPTS loglvl=all guest_loglvl=all dom0_mem=4G console_timestamps=boot $extra_xen_opts
+multiboot2 (http)/gitlab-ci/xen $CONSOLE_OPTS loglvl=all guest_loglvl=all dom0_mem=4G console_timestamps=boot ucode=scan $extra_xen_opts
 module2 (http)/gitlab-ci/vmlinuz console=hvc0 root=/dev/ram0 earlyprintk=xen
 module2 --nounzip (http)/gitlab-ci/initrd-dom0
 " > $TFTP/grub.cfg
 
 echo "#!ipxe
 
-kernel /gitlab-ci/xen $CONSOLE_OPTS loglvl=all guest_loglvl=all dom0_mem=4G console_timestamps=boot $extra_xen_opts || reboot
+kernel /gitlab-ci/xen $CONSOLE_OPTS loglvl=all guest_loglvl=all dom0_mem=4G console_timestamps=boot ucode=scan $extra_xen_opts || reboot
 module /gitlab-ci/vmlinuz console=hvc0 root=/dev/ram0 earlyprintk=xen || reboot
 module /gitlab-ci/initrd-dom0 || reboot
 boot

automation/scripts/xilinx-smoke-dom0-x86_64.sh

@@ -15,7 +15,7 @@ WORKDIR="${PWD}"
 TEST="$1"
 PASS_MSG="Test passed: ${TEST}"
 XEN_CMD_DOM0="dom0=pvh dom0_max_vcpus=4 dom0_mem=4G"
-XEN_CMD_XEN="sched=null loglvl=all guest_loglvl=all console_timestamps=boot"
+XEN_CMD_XEN="sched=null loglvl=all guest_loglvl=all console_timestamps=boot ucode=scan"
 XEN_CMD_EXTRA=""
 DOM0_CMD=""
 DOMU_CMD=""