dt-bindings: msm: dsi: add missing 7nm bindings

These got lost when going from .txt to .yaml bindings, add them back.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Fixes: 8fc939e7 ("dt-bindings: msm: dsi: add yaml schemas for DSI PHY bindings")
Link: https://lore.kernel.org/r/20210617144349.28448-2-jonathan@marek.ca


Reviewed-by: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Rob Clark <robdclark@chromium.org>