arm64: dts: renesas: rzg2lc-smarc-som: Enable PMIC and built-in RTC

Enable PMIC RAA215300 and the built-in RTC on the RZ/G2LC SMARC
EVK.
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20230712151342.82690-1-biju.das.jz@bp.renesas.comSigned-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

arch/arm64/boot/dts/renesas/rzg2lc-smarc-som.dtsi

@@ -62,6 +62,13 @@ vccq_sdhi0: regulator-vccq-sdhi0 {
 		gpios = <&pinctrl RZG2L_GPIO(39, 0) GPIO_ACTIVE_HIGH>;
 		regulator-always-on;
 	};
+
+	/* 32.768kHz crystal */
+	x2: x2-clock {
+		compatible = "fixed-clock";
+		#clock-cells = <0>;
+		clock-frequency = <32768>;
+	};
 };
 
 &eth0 {
@@ -100,6 +107,17 @@ &gpu {
 	mali-supply = <&reg_1p1v>;
 };
 
+&i2c2 {
+	raa215300: pmic@12 {
+		compatible = "renesas,raa215300";
+		reg = <0x12>, <0x6f>;
+		reg-names = "main", "rtc";
+
+		clocks = <&x2>;
+		clock-names = "xin";
+	};
+};
+
 &ostm1 {
 	status = "okay";
 };