arm64: dts: qcom: sm8250: add missing qcom,smmu-500 fallback

Since commit 6c84bbd1 ("dt-bindings: arm-smmu: Add generic
qcom,smmu-500 bindings") the SMMU is supposed to use qcom,smmu-500
compatible fallback:

  ['qcom,sm8250-smmu-500', 'qcom,adreno-smmu', 'qcom,smmu-500', 'arm,mmu-500'] is too long
  'qcom,sm8250-smmu-500' is not one of ['qcom,msm8996-smmu-v2', 'qcom,msm8998-smmu-v2', 'qcom,sdm630-smmu-v2']
  'qcom,sm8250-smmu-500' is not one of ['qcom,msm8996-smmu-v2', 'qcom,sc7180-smmu-v2', 'qcom,sdm630-smmu-v2', 'qcom,sdm845-smmu-v2'
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230416123730.300863-4-krzysztof.kozlowski@linaro.org

arch/arm64/boot/dts/qcom/sm8250.dtsi

@@ -5286,7 +5286,7 @@ wake-pins {
 		};
 
 		apps_smmu: iommu@15000000 {
-			compatible = "qcom,sm8250-smmu-500", "arm,mmu-500";
+			compatible = "qcom,sm8250-smmu-500", "qcom,smmu-500", "arm,mmu-500";
 			reg = <0 0x15000000 0 0x100000>;
 			#iommu-cells = <2>;
 			#global-interrupts = <2>;