[Skiboot] [RFC PATCH] Remove POWER9 DD1 support

[Stewart Smith]

Nicholas Piggin <npiggin at gmail.com> writes:
> There's a couple of cases I'm not sure if they're still needed (marked
> with XXX).
>
> Hostboot and Linux have removed DD1 support so there's not much point
> keeping it around.

Hilariously, we still have P8 DD1 support that works well enough to boot
to a login prompt! I know this because somebody found a palmetto
somewhere in the depths of IBM Austin and asked me why we threw so many
errors while booting... :)

-- 
Stewart Smith
OPAL Architect, IBM.