arm64: dts: renesas: white-hawk: Add I2C0 and EEPROMs

Enable the I2C0 bus on the White Hawk CPU board, and describe the I2C
EEPROMs present on the White Hawk CPU and BreakOut boards.

Based on a larger patch in the BSP by Takeshi Kihara.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/d01cada6f2d3e44dd6cb26cfa8e4ce6382f1fbff.1662715538.git.geert+renesas@glider.be

arch/arm64/boot/dts/renesas/r8a779g0-white-hawk-cpu.dtsi

@@ -40,6 +40,21 @@ &hscif0 {
 	status = "okay";
 };
 
+&i2c0 {
+	pinctrl-0 = <&i2c0_pins>;
+	pinctrl-names = "default";
+
+	status = "okay";
+	clock-frequency = <400000>;
+
+	eeprom@50 {
+		compatible = "rohm,br24g01", "atmel,24c01";
+		label = "cpu-board";
+		reg = <0x50>;
+		pagesize = <8>;
+	};
+};
+
 &pfc {
 	pinctrl-0 = <&scif_clk_pins>;
 	pinctrl-names = "default";
@@ -49,6 +64,11 @@ hscif0_pins: hscif0 {
 		function = "hscif0";
 	};
 
+	i2c0_pins: i2c0 {
+		groups = "i2c0";
+		function = "i2c0";
+	};
+
 	scif_clk_pins: scif_clk {
 		groups = "scif_clk";
 		function = "scif_clk";

arch/arm64/boot/dts/renesas/r8a779g0-white-hawk.dts

@@ -20,3 +20,12 @@ chosen {
 		stdout-path = "serial0:921600n8";
 	};
 };
+
+&i2c0 {
+	eeprom@51 {
+		compatible = "rohm,br24g01", "atmel,24c01";
+		label = "breakout-board";
+		reg = <0x51>;
+		pagesize = <8>;
+	};
+};