nb/via/vx900: Get rid of device_t

Use of device_t has been abandoned in ramstage.

Change-Id: I31143e1c7f1c52dec9673f75d73031632049ddbf
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26529
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
6 files changed