boards: renesas: Add support Flash-LP for Renesas RA4, RA2

Add support Flash-LP for Renesas boards:
- RA4: ek_ra4m1, ek_ra4w1
- RA2: ek_ra2a1, ek_ra2l1

Signed-off-by: Khoa Nguyen <khoa.nguyen.xh@renesas.com>

Author: khoa-nguyen-18

boards/renesas/ek_ra2a1/ek_ra2a1.dts

@@ -17,6 +17,7 @@
 
 	chosen {
 		zephyr,sram = &sram0;
+		zephyr,flash-controller = &flash;
 		zephyr,flash = &flash0;
 		zephyr,console = &uart0;
 		zephyr,shell-uart = &uart0;
@@ -120,3 +121,16 @@
 &wdt {
 	status = "okay";
 };
+
+&flash1 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		storage_partition: partition@0 {
+			label = "storage";
+			reg = <0x0 DT_SIZE_K(8)>;
+		};
+	};
+};

boards/renesas/ek_ra2l1/ek_ra2l1.dts

@@ -22,6 +22,7 @@
 
 	chosen {
 		zephyr,sram = &sram0;
+		zephyr,flash-controller = &flash;
 		zephyr,flash = &flash0;
 		zephyr,console = &uart0;
 		zephyr,shell-uart = &uart0;
@@ -60,3 +61,16 @@
 &wdt {
 	status = "okay";
 };
+
+&flash1 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		storage_partition: partition@0 {
+			label = "storage";
+			reg = <0x0 DT_SIZE_K(8)>;
+		};
+	};
+};

boards/renesas/ek_ra4m1/ek_ra4m1.dts

@@ -17,6 +17,7 @@
 
 	chosen {
 		zephyr,sram = &sram0;
+		zephyr,flash-controller = &flash;
 		zephyr,flash = &flash0;
 		zephyr,console = &uart1;
 		zephyr,shell-uart = &uart1;
@@ -139,3 +140,16 @@
 &wdt {
 	status = "okay";
 };
+
+&flash1 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		storage_partition: partition@0 {
+			label = "storage";
+			reg = <0x0 DT_SIZE_K(8)>;
+		};
+	};
+};

boards/renesas/ek_ra4w1/ek_ra4w1.dts

@@ -17,6 +17,7 @@
 
 	chosen {
 		zephyr,sram = &sram0;
+		zephyr,flash-controller = &flash;
 		zephyr,flash = &flash0;
 		zephyr,console = &uart0;
 		zephyr,shell-uart = &uart0;
@@ -123,3 +124,16 @@
 &wdt {
 	status = "okay";
 };
+
+&flash1 {
+	partitions {
+		compatible = "fixed-partitions";
+		#address-cells = <1>;
+		#size-cells = <1>;
+
+		storage_partition: partition@0 {
+			label = "storage";
+			reg = <0x0 DT_SIZE_K(8)>;
+		};
+	};
+};