mb/nvidia/l1_2pvv: Get rid of device_t

Use of device_t has been abandoned in ramstage.

Change-Id: Ife8ca30322d83c6d9276e79c057f12a901d6e8f2
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26312
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2 files changed