hw/arm/xlnx-zynqmp: Mark the "xlnx, zynqmp" device with user_creatabl…

…e = false

The device uses serial_hds in its realize function and thus can't be
used twice. Apart from that, the comma in its name makes it quite hard
to use for the user anyway, since a comma is normally used to separate
the device name from its properties when using the "-device" parameter
or the "device_add" HMP command.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@xilinx.com>
Message-id: 1506441116-16627-1-git-send-email-thuth@redhat.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

hw/arm/xlnx-zynqmp.c

@@ -440,6 +440,8 @@ static void xlnx_zynqmp_class_init(ObjectClass *oc, void *data)
 
     dc->props = xlnx_zynqmp_props;
     dc->realize = xlnx_zynqmp_realize;
+    /* Reason: Uses serial_hds in realize function, thus can't be used twice */
+    dc->user_creatable = false;
 }
 
 static const TypeInfo xlnx_zynqmp_type_info = {