dt-bindings: display/msm: qcom,sm8750-mdss: Fix model typo

dt-bindings: display/msm: qcom,sm8750-mdss: Fix model typo

Fix obvious model typo (SM8650->SM8750) in the description.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Fixes: 6b93840116df ("dt-bindings: display/msm: qcom,sm8750-mdss: Add SM8750")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/707192/
Link: https://lore.kernel.org/r/20260225173419.125565-2-krzysztof.kozlowski@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>