sb/amd/cimx/sb800: Get rid of device_t

Use of device_t has been abandoned in ramstage.

Change-Id: I2335b7e193663bb6c82bf267aaeb0b2367986f62
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26414
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
6 files changed