soc/intel/fsp_broadwell_de: Get rid of device_t

Use of device_t has been abandoned in ramstage.

Change-Id: I68c455d4bc524c2dd2d3ba87ab6641e70c78521c
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26589
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
10 files changed