mb/lenovo/x2?0/devicetree: Fix regression of BDC detection

The x220 and x230 do have BDC detection, but it's broken.
Disable BDC detection on those two boards, and add a comment
why it doesn't work.

The issue has been reported and tested on Lenovo X220.

Change-Id: Id1ccc2c4387370e284ff8964e1c41d945cefe74c
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/21587
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

0 files changed, 0 insertions, 0 deletions