dt-bindings: arm-smmu: Use qcom,smmu compatible for MMU500 adreno SMMUs

qcom,smmu-500 was introduced to prevent people from adding new
compatibles for what seems to roughly be the same hardware. Use it for
qcom,adreno-smmu-compatible targets as well.

While at it, fix the "arm,smmu-500" -> "arm,mmu-500" typo in the comment.

Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230313-topic-gpu_smmu_bindings-v3-1-66ab655fbfd5@linaro.org
Signed-off-by: Will Deacon <will@kernel.org>

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

@@ -76,9 +76,19 @@ properties:
               - qcom,sm8350-smmu-500
               - qcom,sm8450-smmu-500
           - const: arm,mmu-500
-
-      - description: Qcom Adreno GPUs implementing "arm,smmu-500"
+      - description: Qcom Adreno GPUs implementing "qcom,smmu-500" and "arm,mmu-500"
+        items:
+          - enum:
+              - qcom,sc7280-smmu-500
+              - qcom,sm8150-smmu-500
+              - qcom,sm8250-smmu-500
+          - const: qcom,adreno-smmu
+          - const: qcom,smmu-500
+          - const: arm,mmu-500
+      - description: Qcom Adreno GPUs implementing "arm,mmu-500" (legacy binding)
+        deprecated: true
         items:
+          # Do not add additional SoC to this list. Instead use previous list.
           - enum:
               - qcom,sc7280-smmu-500
               - qcom,sm8150-smmu-500