ARM: shmobile: kzm9g-reference dts: Add r2025sd rtc node

Add a DT node for the R2025D real-time clock, which is connected to
i2c0.
Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

arch/arm/boot/dts/sh73a0-kzm9g-reference.dts

@@ -210,6 +210,11 @@
 			     <3 IRQ_TYPE_LEVEL_HIGH>;
 	};
 
+	rtc@32 {
+		compatible = "ricoh,r2025sd";
+		reg = <0x32>;
+	};
+
 	as3711@40 {
 		compatible = "ams,as3711";
 		reg = <0x40>;