kboot: Move console, acpi and smbios init

Move the console probing to as early as possible. There's no real
support for anything but hostcons, and setting it up early will show
other error messages.

ACPI and SMBIOS probing can be done just after we have the console, so
move it there. This allows other parts of the early code to use info
from that, as well as overriding and env vars set by these things on the
command line (smbios data may be wrong during initial development phases
as the automated way to populate per-board data may not be established,
etc).

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