[U-Boot] [U-Boot, v12, 1/6] sandbox: Put CPUs under a cpu-bus node

[Alexander Graf]

> The CPU uclass expects that all CPUs have a parent device which is a
> cpu-bus. Fix up the sandbox test DT to follow this convention. This allow
> the code in smbios_write_type4_dm() to work, since it calls
> dev_get_parent_platdata() on each CPU.
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>

Thanks, applied to efi-next

Alex