dt-bindings: display/msm: qcm2290-mdss: Fix missing ranges in example

Device node has children with MMIO addressing, so must have ranges:

  msm/qcom,qcm2290-mdss.example.dtb: display-subsystem@5e00000 (qcom,qcm2290-mdss): 'ranges' is a required property

Fixes: 966a08c ("dt-bindings: display: msm: qcm2290-mdss: Fix iommus property")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Reviewed-by: Sumit Garg <sumit.garg@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20260325122209.147128-2-krzysztof.kozlowski@oss.qualcomm.com
Signed-off-by: Bjorn Andersson <andersson@kernel.org>

Author: krzk

Documentation/devicetree/bindings/display/msm/qcom,qcm2290-mdss.yaml

@@ -108,6 +108,7 @@ examples:
                              "cpu-cfg";
 
         iommus = <&apps_smmu 0x420 0x2>;
+        ranges;
 
         display-controller@5e01000 {
             compatible = "qcom,qcm2290-dpu";