sb/broadcom/bcm5780: Get rid of device_t

Use of device_t has been abandoned in ramstage.

Change-Id: Ia46b909c78086d9417cabc1cd65e16d264a8df8e
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26402
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
2 files changed