dts: P2041RDB: Add ESPI slave device node

Add ESPI slave node for P2041RDB.

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/p2041rdb.dts b/arch/powerpc/dts/p2041rdb.dts
index 9d59f9c..0fa1f09 100644
--- a/arch/powerpc/dts/p2041rdb.dts
+++ b/arch/powerpc/dts/p2041rdb.dts
@@ -26,6 +26,7 @@
 		phy_sgmii_1e = &phy_sgmii_1e;
 		phy_sgmii_1f = &phy_sgmii_1f;
 		phy_xgmii_2 = &phy_xgmii_2;
+		spi0 = &espi0;
 	};
 
 	soc: soc@ffe000000 {
@@ -111,4 +112,16 @@
 	};
 };
 
+&espi0 {
+	status = "okay";
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		reg = <0>;
+		/* input clock */
+		spi-max-frequency = <10000000>;
+	};
+};
+
 /include/ "p2041si-post.dtsi"