soc/broadcom/cygnus: Get rid of device_t

Use of device_t has been abandoned in ramstage.

Change-Id: Id41279a1cdc7c68d3dcc44e238863f2f4a452499
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26533
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
1 file changed