dt-bindings: display/msm: Remove DSI1 ports from SM6350/SM6375 example

Both SM6350 and SM6375 support only a single DSI link, and don't have a
corresponding dsi1 node in DTS.  Their examples should not suggest an
output interface port on the display-controller node to this inexistant
DSI host, with a dsi1_in label reference that doesn't exist in the
example either.

Fixes: 3b7502b0 ("dt-bindings: display/msm: Add SM6350 MDSS")
Fixes: 2a5c1021 ("dt-bindings: display/msm: Add SM6375 MDSS")
Signed-off-by: Marijn Suijten <marijn.suijten@somainline.org>
Acked-by: Rob Herring <robh@kernel.org>
Patchwork: https://patchwork.freedesktop.org/patch/548961/
Link: https://lore.kernel.org/r/20230723-sm6125-dpu-v4-4-a3f287dd6c07@somainline.org


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