arm64: dts: qcom: sm8250: Mark SMMUs as DMA coherent

The SMMUs on SM8250 are cache-coherent. Mark them as such.

Fixes: a89441fc ("arm64: dts: qcom: sm8250: add apps_smmu node")
Fixes: 04a3605b ("arm64: dts: qcom: add sm8250 GPU nodes")
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Link: https://lore.kernel.org/r/20230704-topic-8250_pcie_dmac-v1-2-799603a980b0@linaro.orgSigned-off-by: Bjorn Andersson <andersson@kernel.org>

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

@@ -2729,6 +2729,7 @@ adreno_smmu: iommu@3da0000 {
 			clock-names = "ahb", "bus", "iface";
 
 			power-domains = <&gpucc GPU_CX_GDSC>;
+			dma-coherent;
 		};
 
 		slpi: remoteproc@5c00000 {
@@ -5399,6 +5400,7 @@ apps_smmu: iommu@15000000 {
 				     <GIC_SPI 696 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 697 IRQ_TYPE_LEVEL_HIGH>,
 				     <GIC_SPI 707 IRQ_TYPE_LEVEL_HIGH>;
+			dma-coherent;
 		};
 
 		adsp: remoteproc@17300000 {