dt-bindings: display: msm: drop unneeded list for single compatible

With only one compatible, there is no need to define it as list (items).

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Patchwork: https://patchwork.freedesktop.org/patch/516031/
Link: https://lore.kernel.org/r/20221225115925.55337-2-krzysztof.kozlowski@linaro.org


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