aspeed: Change the "scu" property definition

The Aspeed Watchdog and Timer models have a link pointing to the SCU
controller model of the machine.

Change the "scu" property definition so that it explicitly sets the
pointer. The property isn't optional : not being able to set the link
is a bug and QEMU should rather abort than exit in this case.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Greg Kurz <groug@kaod.org>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Message-id: 20191119141211.25716-17-clg@kaod.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
4 files changed