mb/lenovo/x200: Make button on dock to undock work

Fetched from vendor DSDT.

Change-Id: Ib74408802e977d9caabcb815c9cbd06bd8dbe395
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/19539
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Kevin Keijzer <kevin@librepractice.org>
Reviewed-by: Alexander Couzens <lynxis@fe80.eu>
1 file changed