Change in coreboot[master]: mb/lenovo/x200: Fix docking events

[Kevin Keijzer (Code Review)]

Attention is currently required from: Bill XIE, Nico Huber, Arthur Heymans, Alexander Couzens, Patrick Rudolph, Kevin Keijzer.
Kevin Keijzer has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/51118 )

Change subject: mb/lenovo/x200: Fix docking events
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Patch Set 1: Code-Review+1

(4 comments)

Patchset:

PS1:
> I just did a checkout of 96ae7a3a2d38b96c1dfee57fda2c2eaab7e9e762 and then cherry-picked this one. […]

Done

PS1:
> Maybe try to do something similar to CB:39708 on the X200.

Done

PS1:
> The button on the side is also still broken, though Fn+F9 does work

Done

PS1: 
This change should fix the redocking being broken. I have pushed another change (CB:51123) for fixing the undocking after resume, which also seems to fix the undock button on the left side of the dock.

TESTED on Lenovo X200