rust: do not use TYPE_CHARDEV unnecessarily

In the invocation of qdev_prop_set_chr(), "chardev" is the name of a
property rather than a type and has to match the name of the property
in device_class.rs.  Do not use TYPE_CHARDEV here, just like in the C
version of pl011_create.

Reviewed-by: Junjie Mao <junjie.mao@hotmail.com>
Reviewed-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
diff --git a/rust/hw/char/pl011/src/device.rs b/rust/hw/char/pl011/src/device.rs
index 0347a02..b3d8bc0 100644
--- a/rust/hw/char/pl011/src/device.rs
+++ b/rust/hw/char/pl011/src/device.rs
@@ -573,7 +573,7 @@
         let dev: *mut DeviceState = qdev_new(PL011State::TYPE_INFO.name);
         let sysbus: *mut SysBusDevice = dev.cast::<SysBusDevice>();
 
-        qdev_prop_set_chr(dev, bindings::TYPE_CHARDEV.as_ptr(), chr);
+        qdev_prop_set_chr(dev, c"chardev".as_ptr(), chr);
         sysbus_realize_and_unref(sysbus, addr_of!(error_fatal) as *mut *mut Error);
         sysbus_mmio_map(sysbus, 0, addr);
         sysbus_connect_irq(sysbus, 0, irq);