arm/dt: tegra: Clean up I2S and DAS nodes

The I2S and DAS nodes don't have children, and hence don't need to set
address/size cells.
Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/boot/dts/tegra20.dtsi

@@ -45,8 +45,6 @@ i2c@7000d000 {
 	};
 
 	i2s@70002800 {
-		#address-cells = <1>;
-		#size-cells = <0>;
 		compatible = "nvidia,tegra20-i2s";
 		reg = <0x70002800 0x200>;
 		interrupts = < 45 >;
@@ -54,8 +52,6 @@ i2s@70002800 {
 	};
 
 	i2s@70002a00 {
-		#address-cells = <1>;
-		#size-cells = <0>;
 		compatible = "nvidia,tegra20-i2s";
 		reg = <0x70002a00 0x200>;
 		interrupts = < 35 >;
@@ -63,8 +59,6 @@ i2s@70002a00 {
 	};
 
 	das@70000c00 {
-		#address-cells = <1>;
-		#size-cells = <0>;
 		compatible = "nvidia,tegra20-das";
 		reg = <0x70000c00 0x80>;
 	};