hw/arm/virt: Add virt-2.12 machine type

Add virt-2.12 machine type.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

hw/arm/virt.c

@@ -1618,7 +1618,7 @@ static void machvirt_machine_init(void)
 }
 type_init(machvirt_machine_init);
 
-static void virt_2_11_instance_init(Object *obj)
+static void virt_2_12_instance_init(Object *obj)
 {
     VirtMachineState *vms = VIRT_MACHINE(obj);
     VirtMachineClass *vmc = VIRT_MACHINE_GET_CLASS(vms);
@@ -1678,10 +1678,25 @@ static void virt_2_11_instance_init(Object *obj)
     vms->irqmap = a15irqmap;
 }
 
+static void virt_machine_2_12_options(MachineClass *mc)
+{
+}
+DEFINE_VIRT_MACHINE_AS_LATEST(2, 12)
+
+#define VIRT_COMPAT_2_11 \
+    HW_COMPAT_2_11
+
+static void virt_2_11_instance_init(Object *obj)
+{
+    virt_2_12_instance_init(obj);
+}
+
 static void virt_machine_2_11_options(MachineClass *mc)
 {
+    virt_machine_2_12_options(mc);
+    SET_MACHINE_COMPAT(mc, VIRT_COMPAT_2_11);
 }
-DEFINE_VIRT_MACHINE_AS_LATEST(2, 11)
+DEFINE_VIRT_MACHINE(2, 11)
 
 #define VIRT_COMPAT_2_10 \
     HW_COMPAT_2_10