ARM: dts: hummingboard: enable PCF8523 RTC support

Enable the commented out PCF8523 RTC support for Hummingboard pro
base boards.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx6qdl-hummingboard.dtsi

@@ -113,16 +113,13 @@
 &i2c1 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&pinctrl_hummingboard_i2c1>;
-
-	/*
-	 * Not fitted on Carrier-1 board... yet
 	status = "okay";
 
+	/* Pro baseboard model */
 	rtc: pcf8523@68 {
 		compatible = "nxp,pcf8523";
 		reg = <0x68>;
 	};
-	 */
 };
 
 &i2c2 {