[coreboot - Feature #108] thinkpad x1 carbon gen 1 remaining tasks

Issue #108 has been updated by lx r.

I don't have this laptop anymore.

----------------------------------------
Feature #108: thinkpad x1 carbon gen 1 remaining tasks
https://ticket.coreboot.org/issues/108#change-867

* Author: lx r
* Status: In Progress
* Priority: Normal
* Assignee: Alexander Couzens
* Category: board support
* Target version: 
----------------------------------------
* ~~SPD based on inteltool for elpida~~
 * ~~missing samsung memory (missing a model or find spd data in uefi)~~
 * ~~missing hynix memory (missing a model or find spd data in uefi)~~
* test msata port if soldered (missing msata disk)
* ~~use pins to differ 4gb and 8gb (prepare, but missing a model to verify)~~
* check why device consumes more power (+ 3W while idle)
 * do another test run how much is the difference, see if `powertop --auto-tune` works
 * check if thermal/power/freq MSR are different
 * check if it's display backlight
 * check how big is the consumption when turning display off
* enable pci/sata link power save