arm64: dts: qcom: sm6115: Add smmu fallback to qcom generic compatible

Add fallback to generic qcom mmu-500 implementation.
Signed-off-by: Adam Skladowski <a39.skl@gmail.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20221130200950.144618-13-a39.skl@gmail.com

arch/arm64/boot/dts/qcom/sm6115.dtsi

@@ -1233,7 +1233,7 @@ dispcc: clock-controller@5f00000 {
 		};
 
 		apps_smmu: iommu@c600000 {
-			compatible = "qcom,sm6115-smmu-500", "arm,mmu-500";
+			compatible = "qcom,sm6115-smmu-500", "qcom,smmu-500", "arm,mmu-500";
 			reg = <0x0c600000 0x80000>;
 			#iommu-cells = <2>;
 			#global-interrupts = <1>;