Fix qdev property type definition for isa serial/parallel devices

Use the correct qdev property type for these devices.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
diff --git a/hw/serial.c b/hw/serial.c
index 0063260..e7538ac 100644
--- a/hw/serial.c
+++ b/hw/serial.c
@@ -900,7 +900,7 @@
     .qdev.size  = sizeof(ISASerialState),
     .init       = serial_isa_initfn,
     .qdev.props = (Property[]) {
-        DEFINE_PROP_HEX32("index",  ISASerialState, index,   -1),
+        DEFINE_PROP_UINT32("index", ISASerialState, index,   -1),
         DEFINE_PROP_HEX32("iobase", ISASerialState, iobase,  -1),
         DEFINE_PROP_UINT32("irq",   ISASerialState, isairq,  -1),
         DEFINE_PROP_CHR("chardev",  ISASerialState, state.chr),