arm64: dts: qcom: sm8250: Enable per-process page tables.

This is an SMMU for the adreno gpu, and adding this compatible lets
the driver use per-fd page tables, which are required for security
between GPU clients.
Signed-off-by: Emma Anholt <emma@anholt.net>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
[bjorn: Move arm,smmu-500 last, per Dmitry's request]
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20220614230136.3726047-2-emma@anholt.net

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

@@ -2625,7 +2625,7 @@ gpucc: clock-controller@3d90000 {
 		};
 
 		adreno_smmu: iommu@3da0000 {
-			compatible = "qcom,sm8250-smmu-500", "arm,mmu-500";
+			compatible = "qcom,sm8250-smmu-500", "qcom,adreno-smmu", "arm,mmu-500";
 			reg = <0 0x03da0000 0 0x10000>;
 			#iommu-cells = <2>;
 			#global-interrupts = <2>;