ARM: dts: imx6q-sabrelite: add ssi device

Signed-off-by: Richard Zhao <richard.zhao@linaro.org>
Signed-off-by: Richard Zhao <richard.zhao@freescale.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
diff --git a/arch/arm/boot/dts/imx6q.dtsi b/arch/arm/boot/dts/imx6q.dtsi
index 72ccd1d..760ca33 100644
--- a/arch/arm/boot/dts/imx6q.dtsi
+++ b/arch/arm/boot/dts/imx6q.dtsi
@@ -177,19 +177,31 @@
 					interrupts = <0 51 0x04>;
 				};
 
-				ssi@02028000 { /* SSI1 */
+				ssi1: ssi@02028000 {
+					compatible = "fsl,imx6q-ssi","fsl,imx21-ssi";
 					reg = <0x02028000 0x4000>;
 					interrupts = <0 46 0x04>;
+					fsl,fifo-depth = <15>;
+					fsl,ssi-dma-events = <38 37>;
+					status = "disabled";
 				};
 
-				ssi@0202c000 { /* SSI2 */
+				ssi2: ssi@0202c000 {
+					compatible = "fsl,imx6q-ssi","fsl,imx21-ssi";
 					reg = <0x0202c000 0x4000>;
 					interrupts = <0 47 0x04>;
+					fsl,fifo-depth = <15>;
+					fsl,ssi-dma-events = <42 41>;
+					status = "disabled";
 				};
 
-				ssi@02030000 { /* SSI3 */
+				ssi3: ssi@02030000 {
+					compatible = "fsl,imx6q-ssi","fsl,imx21-ssi";
 					reg = <0x02030000 0x4000>;
 					interrupts = <0 48 0x04>;
+					fsl,fifo-depth = <15>;
+					fsl,ssi-dma-events = <46 45>;
+					status = "disabled";
 				};
 
 				asrc@02034000 {