ARM: dts: vf-colibri-eval-v3.dts: Enable ST-M41T0M6 RTC

ST-M41T0M6 is available on Colibri carrier boards.
Hence enable M41T0M6 RTC.
Acked-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/vf-colibri-eval-v3.dtsi

@@ -35,6 +35,12 @@ &fec1 {
 
 &i2c0 {
 	status = "okay";
+
+	/* M41T0M6 real time clock on carrier board */
+	rtc: m41t0m6@68 {
+		compatible = "st,m41t00";
+		reg = <0x68>;
+	};
 };
 
 &pwm0 {