ARM: dts: ls1021a: Add support for QSPI with ls1021a SoC

Add QSPI node support, and this function is disabled by default
This setting could be overwritten in board-level definitions
Signed-off-by: NSZ Lin <sz.lin@moxa.com>
Acked-by: NLi Yang <leoyang.li@nxp.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/ls1021a.dtsi

@@ -154,6 +154,20 @@
 			big-endian;
 		};
 
+		qspi: quadspi@1550000 {
+			compatible = "fsl,ls1021a-qspi";
+			#address-cells = <1>;
+			#size-cells = <0>;
+			reg = <0x0 0x1550000 0x0 0x10000>,
+			      <0x0 0x40000000 0x0 0x40000000>;
+			reg-names = "QuadSPI", "QuadSPI-memory";
+			interrupts = <GIC_SPI 131 IRQ_TYPE_LEVEL_HIGH>;
+			clock-names = "qspi_en", "qspi";
+			clocks = <&clockgen 4 1>, <&clockgen 4 1>;
+			big-endian;
+			status = "disabled";
+		};
+
 		esdhc: esdhc@1560000 {
 			compatible = "fsl,esdhc";
 			reg = <0x0 0x1560000 0x0 0x10000>;