boards/arm: stm32l562e_dk: Enabling flash support in device tree

This commit enables flash support in stm32l562e_dk platform
in device tree.

Signed-off-by: Krishna Mohan Dani <[email protected]>

Author: ikmdani

boards/arm/stm32l562e_dk/stm32l562e_dk.dts

@@ -52,3 +52,17 @@
 &aes {
 	status = "okay";
 };
+
+&flash0 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		/* 2KB at the end of 512KB flash is set for storage */
+		storage_partition: partition@7f800 {
+			   label = "storage";
+			   reg = <0x0007f800 0x00000800>;
+		   };
+	};
+};