Replace the use of the old device_t definition inside
mainboard/getac/p470.
Change-Id: Ifb81976ed7068f9d51edb0d297cd4a12265c51ec
Signed-off-by: Antonello Dettori <dev@dettori.io>
Reviewed-on: https://review.coreboot.org/17293
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>