ARM: dts: rockchip: add channels properties for i2s

add playback and capture properties to compatible various chips.

Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
diff --git a/arch/arm/boot/dts/rk3066a.dtsi b/arch/arm/boot/dts/rk3066a.dtsi
index 946f187..1003f9c 100644
--- a/arch/arm/boot/dts/rk3066a.dtsi
+++ b/arch/arm/boot/dts/rk3066a.dtsi
@@ -103,6 +103,8 @@
 		dma-names = "tx", "rx";
 		clock-names = "i2s_hclk", "i2s_clk";
 		clocks = <&cru HCLK_I2S0>, <&cru SCLK_I2S0>;
+		rockchip,playback-channels = <8>;
+		rockchip,capture-channels = <2>;
 		status = "disabled";
 	};
 
@@ -118,6 +120,8 @@
 		dma-names = "tx", "rx";
 		clock-names = "i2s_hclk", "i2s_clk";
 		clocks = <&cru HCLK_I2S1>, <&cru SCLK_I2S1>;
+		rockchip,playback-channels = <2>;
+		rockchip,capture-channels = <2>;
 		status = "disabled";
 	};
 
@@ -133,6 +137,8 @@
 		dma-names = "tx", "rx";
 		clock-names = "i2s_hclk", "i2s_clk";
 		clocks = <&cru HCLK_I2S2>, <&cru SCLK_I2S2>;
+		rockchip,playback-channels = <2>;
+		rockchip,capture-channels = <2>;
 		status = "disabled";
 	};