hw/arm/aspeed: Unlock SCU when running kernel
The ASPEED hardware contains a lock register for the SCU that disables any writes to the SCU when it is locked. The machine comes up with the lock enabled, but on all known hardware u-boot will unlock it and leave it unlocked when loading the kernel. This means the kernel expects the SCU to be unlocked. When booting from an emulated ROM the normal u-boot unlock path is executed. Things don't go well when booting using the -kernel command line, as u-boot does not run first. Change behaviour so that when a kernel is passed to the machine, set the reset value of the SCU to be unlocked. Signed-off-by: NJoel Stanley <joel@jms.id.au> Reviewed-by: NCédric Le Goater <clg@kaod.org> Message-id: 20171114122018.12204-1-joel@jms.id.au Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
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