nb/intel/haswell: Get rid of device_t

Use of device_t has been abandoned in ramstage.

Change-Id: I10fb736a7406a6571dffce883fb82c2711526762
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26196
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
5 files changed