automation: Switch u-boot boot command to bootz for arm32 tests

Thanks to recent changes added to ImageBuilder to support the bootz
command, which allows obtaining the effective image size (including NOLOAD
sections) from the zImage header, switch the BOOT_CMD for arm32 tests to
bootz. Among other scenarios, this change will enable us, in the future,
to add tests with UBSAN enabled Xen, which would otherwise fail due to
incorrect image placement resulting in overlapping.

Signed-off-by: Michal Orzel <michal.orzel@amd.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>

automation/scripts/qemu-smoke-dom0-arm32.sh

@@ -68,7 +68,7 @@ XEN_CMD="console=dtuart dom0_mem=1024M bootscrub=0 console_timestamps=boot"
 NUM_DOMUS=0
 
 LOAD_CMD="tftpb"
-BOOT_CMD="bootm"
+BOOT_CMD="bootz"
 UBOOT_SOURCE="boot.source"
 UBOOT_SCRIPT="boot.scr"' > config
 

automation/scripts/qemu-smoke-dom0less-arm32.sh

@@ -101,7 +101,7 @@ DOMU_MEM[0]="512"
 NUM_DOMUS=1
 
 LOAD_CMD="tftpb"
-BOOT_CMD="bootm"
+BOOT_CMD="bootz"
 UBOOT_SOURCE="boot.source"
 UBOOT_SCRIPT="boot.scr"' > config