dt-bindings: display/msm: dsi-controller-main: add SDM670 compatible

The SDM670 has DSI ports. Add the compatible for the controller.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Richard Acayan <mailingradian@gmail.com>
Patchwork: https://patchwork.freedesktop.org/patch/562958/
Link: https://lore.kernel.org/r/20231017021805.1083350-10-mailingradian@gmail.com


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