ARM: dt: tegra30.dtsi: Add SMMU node

Add a node for the Tegra30 SMMU
Signed-off-by: NHiroshi DOYU <hdoyu@nvidia.com>
Signed-off-by: NStephen Warren <swarren@nvidia.com>

arch/arm/boot/dts/tegra30.dtsi

@@ -238,4 +238,14 @@
 		       0x7000f284 0x17c>;
 		interrupts = <0 77 0x04>;
 	};
+
+	smmu {
+		compatible = "nvidia,tegra30-smmu";
+		reg = <0x7000f010 0x02c
+		       0x7000f1f0 0x010
+		       0x7000f228 0x05c>;
+		nvidia,#asids = <4>;		/* # of ASIDs */
+		dma-window = <0 0x40000000>;	/* IOVA start & length */
+		nvidia,ahb = <&ahb>;
+	};
 };