dts: P4080DS: Add ESPI slave device node

Add ESPI slave node for P4080DS.

Signed-off-by: Xiaowei Bao <xiaowei.bao@nxp.com>
Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
[Rebased]
Signed-off-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/arch/powerpc/dts/p4080ds.dts b/arch/powerpc/dts/p4080ds.dts
index 53c51d4..d5618f1 100644
--- a/arch/powerpc/dts/p4080ds.dts
+++ b/arch/powerpc/dts/p4080ds.dts
@@ -27,6 +27,7 @@
 		emi1_rgmii = &p4080mdio0;
 		emi2_slot4 = &p4080xmdio1;
 		emi2_slot5 = &p4080xmdio3;
+		spi0 = &espi0;
 	};
 
 	soc: soc@ffe000000 {
@@ -204,4 +205,16 @@
 	};
 };
 
+&espi0 {
+	status = "okay";
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		reg = <0>;
+		/* input clock */
+		spi-max-frequency = <10000000>;
+	};
+};
+
 /include/ "p4080si-post.dtsi"