automation: Modify static-mem check in qemu-smoke-dom0less-arm64.sh

At the moment, the static-mem check relies on the way Xen exposes the
memory banks in device tree. As this might change, the check should be
modified to be generic and not to rely on device tree. In this case,
let's use /proc/iomem which exposes the memory ranges in %08x format
as follows:
<start_addr>-<end_addr> : <description>

This way, we can grep in /proc/iomem for an entry containing memory
region defined by the static-mem configuration with "System RAM"
description. If it exists, mark the test as passed. Also, take the
opportunity to add 0x prefix to domu_{base,size} definition rather than
adding it in front of each occurence.

Signed-off-by: Michal Orzel <michal.orzel@amd.com>
Reviewed-by: Xenia Ragiadakou <burzalodowa@gmail.com>
Reviewed-by: Ayan Kumar Halder <ayan.kumar.halder@amd.com>
Acked-by: Stefano Stabellini <sstabellini@kernel.org>

automation/scripts/qemu-smoke-dom0less-arm64.sh

@@ -16,13 +16,12 @@ fi
 
 if [[ "${test_variant}" == "static-mem" ]]; then
     # Memory range that is statically allocated to DOM1
-    domu_base="50000000"
-    domu_size="10000000"
+    domu_base="0x50000000"
+    domu_size="0x10000000"
     passed="${test_variant} test passed"
     domU_check="
-current=\$(hexdump -e '16/1 \"%02x\"' /proc/device-tree/memory@${domu_base}/reg 2>/dev/null)
-expected=$(printf \"%016x%016x\" 0x${domu_base} 0x${domu_size})
-if [[ \"\${expected}\" == \"\${current}\" ]]; then
+mem_range=$(printf \"%08x-%08x\" ${domu_base} $(( ${domu_base} + ${domu_size} - 1 )))
+if grep -q -x \"\${mem_range} : System RAM\" /proc/iomem; then
     echo \"${passed}\"
 fi
 "
@@ -126,7 +125,7 @@ UBOOT_SOURCE="boot.source"
 UBOOT_SCRIPT="boot.scr"' > binaries/config
 
 if [[ "${test_variant}" == "static-mem" ]]; then
-    echo -e "\nDOMU_STATIC_MEM[0]=\"0x${domu_base} 0x${domu_size}\"" >> binaries/config
+    echo -e "\nDOMU_STATIC_MEM[0]=\"${domu_base} ${domu_size}\"" >> binaries/config
 fi
 
 if [[ "${test_variant}" == "boot-cpupools" ]]; then