qemu: Update query-cpu-model-expansion check

CPU features are available on ARM only wherever the
query-cpu-model-expansion QMP command is available, same as
on s390. Update qemuBuildCpuModelArgStr() to reflect this
fact.
Signed-off-by: NAndrea Bolognani <abologna@redhat.com>
Tested-by: NAndrew Jones <drjones@redhat.com>
Reviewed-by: NMichal Privoznik <mprivozn@redhat.com>

src/qemu/qemu_command.c

@@ -6703,7 +6703,8 @@ qemuBuildCpuModelArgStr(virQEMUDriverPtr driver,
         break;
     }
 
-    if (ARCH_IS_S390(def->os.arch) && cpu->features &&
+    if ((ARCH_IS_S390(def->os.arch) || ARCH_IS_ARM(def->os.arch)) &&
+        cpu->features &&
         !virQEMUCapsGet(qemuCaps, QEMU_CAPS_QUERY_CPU_MODEL_EXPANSION)) {
         virReportError(VIR_ERR_INTERNAL_ERROR,
                        _("CPU features not supported by hypervisor for %s "