dm: ls1021a: dts: Add QSPI dts node

Add QSPI controller dts node in ls1021a.dtsi.
Add QSPI slave device dts node in ls1021a-twr.dts and ls1021a-qds.dts.

Signed-off-by: Haikun Wang <Haikun.Wang@freescale.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/dts/ls1021a.dtsi b/arch/arm/dts/ls1021a.dtsi
index 8b3c557..7fadd7c 100644
--- a/arch/arm/dts/ls1021a.dtsi
+++ b/arch/arm/dts/ls1021a.dtsi
@@ -170,6 +170,17 @@
 			status = "disabled";
 		};
 
+		qspi: quadspi@1550000 {
+			compatible = "fsl,vf610-qspi";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x1550000 0x10000>,
+				<0x40000000 0x4000000>;
+			num-cs = <2>;
+			big-endian;
+			status = "disabled";
+		};
+
 		i2c0: i2c@2180000 {
 			compatible = "fsl,vf610-i2c";
 			#address-cells = <1>;