(Maybe HAVE_LINEAR_FRAMEBUFFER? But that option doesn't seem to be super well-maintained because it doesn't really do much... e.g. MT8183/GOOGLE_KUKUI doesn't seem to set it. If we wanted to rely on that it would be good to have an assertion that reminds people to select it from their SoCs... maybe in set_vbe_mode_info_valid()?)

edit: I just noticed the Kukui display patches haven't landed yet, and they'll select that option when they do. So it's probably authoritative anyway (otherwise lb_framebuffer() won't work).

So I think we could solve this by just changing the vboot_logic.c code to

 if (CONFIG(VBOOT_FORCE_DISPLAY_INIT) || !CONFIG(LINEAR_FRAMEBUFFER))
   ctx.flags |= VB2_CONTEXT_DISPLAY_INIT;

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