dt-bindings: arm-smmu: Add SM6375 GPU SMMU

SM6375 has a "Qualcomm SMMU V2" implementation for its GPU SMMU. It
does not however qualify for the qcom,adreno-smmu compatible, as it can
not do split pagetables. It consumes a single clock and a single genpd.

Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20230531-topic-sm6375_gpusmmu-v1-1-860943894c71@linaro.org
Signed-off-by: Will Deacon <will@kernel.org>

Author: konradybcio

Documentation/devicetree/bindings/iommu/arm,smmu.yaml

@@ -29,6 +29,7 @@ properties:
               - qcom,msm8996-smmu-v2
               - qcom,msm8998-smmu-v2
               - qcom,sdm630-smmu-v2
+              - qcom,sm6375-smmu-v2
           - const: qcom,smmu-v2
 
       - description: Qcom SoCs implementing "qcom,smmu-500" and "arm,mmu-500"
@@ -269,6 +270,7 @@ allOf:
             enum:
               - qcom,msm8998-smmu-v2
               - qcom,sdm630-smmu-v2
+              - qcom,sm6375-smmu-v2
     then:
       anyOf:
         - properties: