piix: Move pc-0.14 qxl compat properties to PC_COMPAT_0_14

Those properties were introduced by commit
3827cdb1. They were not duplicated into
pc-0.13 and older because 0.14 was the first QEMU version supporting
qxl. The only problem is that this breaks the PC_COMPAT_* nesting
pattern we currently use.

So, move the properties to PC_COMPAT_0_14. This makes pc-0.13 and older
inherit them, but that shouldn't be an issue as QEMU 0.13 didn't support
qxl.

Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NEduardo Habkost <ehabkost@redhat.com>
Reviewed-by: NMichael S. Tsirkin <mst@redhat.com>
Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>

hw/i386/pc_piix.c

@@ -808,6 +808,14 @@ static QEMUMachine pc_machine_v0_15 = {
             .driver   = "virtio-balloon-pci",\
             .property = "event_idx",\
             .value    = "off",\
+        },{\
+            .driver   = "qxl",\
+            .property = "revision",\
+            .value    = stringify(2),\
+        },{\
+            .driver   = "qxl-vga",\
+            .property = "revision",\
+            .value    = stringify(2),\
         },
 
 static QEMUMachine pc_machine_v0_14 = {
@@ -815,15 +823,6 @@ static QEMUMachine pc_machine_v0_14 = {
     .name = "pc-0.14",
     .compat_props = (GlobalProperty[]) {
         PC_COMPAT_0_14
-        {
-            .driver   = "qxl",
-            .property = "revision",
-            .value    = stringify(2),
-        },{
-            .driver   = "qxl-vga",
-            .property = "revision",
-            .value    = stringify(2),
-        },
         { /* end of list */ }
     },
     .hw_version = "0.14",