dt-bindings: iommu: qcom: Add Qualcomm MSM8953 compatible

Document the compatible used for IOMMU on the msm8953 SoC.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Luca Weiss <luca@z3ntu.xyz>
Link: https://lore.kernel.org/r/20221105142016.93406-1-luca@z3ntu.xyzSigned-off-by: Will Deacon <will@kernel.org>

Documentation/devicetree/bindings/iommu/qcom,iommu.txt

@@ -10,6 +10,7 @@ to non-secure vs secure interrupt line.
 - compatible       : Should be one of:
 
                         "qcom,msm8916-iommu"
+                        "qcom,msm8953-iommu"
 
                      Followed by "qcom,msm-iommu-v1".