ARM: dts: Add I2S dt node for exynos3250

This patch add I2S (Inter-IC Sound) dt node which supports 1-port
stereo (1 channels) IIS-bus for audio interface with DMA-based
operation.
Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Inha Song <ideal.song@samsung.com>
Tested-by: Inha Song <ideal.song@samsung.com>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

arch/arm/boot/dts/exynos3250.dtsi

@@ -425,6 +425,19 @@ spi_1: spi@13930000 {
 			status = "disabled";
 		};
 
+		i2s2: i2s@13970000 {
+			compatible = "samsung,s3c6410-i2s";
+			reg = <0x13970000 0x100>;
+			interrupts = <0 126 0>;
+			clocks = <&cmu CLK_I2S>, <&cmu CLK_SCLK_I2S>;
+			clock-names = "iis", "i2s_opclk0";
+			dmas = <&pdma0 14>, <&pdma0 13>;
+			dma-names = "tx", "rx";
+			pinctrl-0 = <&i2s2_bus>;
+			pinctrl-names = "default";
+			status = "disabled";
+		};
+
 		pwm: pwm@139D0000 {
 			compatible = "samsung,exynos4210-pwm";
 			reg = <0x139D0000 0x1000>;