ARM: dt: tegra: Add device tree support for AHB

Add AHB entry for tegra20/30.
Signed-off-by: Hiroshi DOYU <hdoyu@nvidia.com>
Signed-off-by: Stephen Warren <swarren@nvidia.com>

arch/arm/boot/dts/tegra20.dtsi

@@ -206,5 +206,10 @@ usb@c5008000 {
 		interrupts = < 0 97 0x04 >;
 		phy_type = "utmi";
 	};
+
+	ahb: ahb@6000c004 {
+		compatible = "nvidia,tegra20-ahb";
+		reg = <0x6000c004 0x10c>; /* AHB Arbitration + Gizmo Controller */
+	};
 };
 

arch/arm/boot/dts/tegra30.dtsi

@@ -224,4 +224,9 @@ tegra_i2s4: i2s@70080700 {
 			nvidia,ahub-cif-ids = <8 8>;
 		};
 	};
+
+	ahb: ahb@6000c004 {
+		compatible = "nvidia,tegra30-ahb";
+		reg = <0x6000c004 0x14c>; /* AHB Arbitration + Gizmo Controller */
+	};
 };