cpu/x86: Get rid of device_t

Use of `device_t` has been abandoned in ramstage.

Change-Id: I4c8acebb4a957a9600de15ea844f620a8909977b
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/23656
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
1 file changed