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-twr.dts b/arch/arm/dts/ls1021a-twr.dts
index 3d9f23b..0e61c07 100644
--- a/arch/arm/dts/ls1021a-twr.dts
+++ b/arch/arm/dts/ls1021a-twr.dts
@@ -16,6 +16,20 @@
 		enet2_rgmii_phy = &rgmii_phy1;
 		enet0_sgmii_phy = &sgmii_phy2;
 		enet1_sgmii_phy = &sgmii_phy0;
+		spi0 = &qspi;
+	};
+};
+
+&qspi {
+	bus-num = <0>;
+	status = "okay";
+
+	qflash0: n25q128a13@0 {
+		#address-cells = <1>;
+		#size-cells = <1>;
+		compatible = "spi-flash";
+		spi-max-frequency = <20000000>;
+		reg = <0>;
 	};
 };