nb/intel/i945: Get rid of device_t

Use of `device_t`has been abandoned in ramstage.

Change-Id: I2cc938958097e416b85f6592cb8a4e645a3746ed
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/23654
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
3 files changed