Replace the use of the old device_t definition inside
northbridge/amd/amdk8.
Change-Id: I5209dd309f0685f83d8a468c50309d5fda77973a
Signed-off-by: Antonello Dettori <dev@dettori.io>
Reviewed-on: https://review.coreboot.org/16467
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>