dt-bindings: display: imx/ldb: drop ddc-i2c-bus property

The in-kernel DT files do not use ddc-i2c-bus property with the iMX LVDS
Display Bridge. If in future a need arises to support such usecase, the
panel-simple should be used, which is able to handle the DDC bus.

Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Philipp Zabel <p.zabel@pengutronix.de>
Tested-by: Chris Healy <cphealy@gmail.com>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de> # on imx6q-nitrogen6x
Link: https://patchwork.freedesktop.org/patch/msgid/20240602-drm-imx-cleanup-v3-2-e549e2a43100@linaro.org


Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>