ARM: dts: imx53-tx53: add trickle-charge config for DS1339

As the DS1339 driver now supports enabling the trickle charge feature
via DTB, add the appropriate properties to utilize this feature.
Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx53-tx53.dtsi

@@ -245,6 +245,8 @@ rtc1: ds1339@68 {
 		pinctrl-0 = <&pinctrl_ds1339>;
 		interrupt-parent = <&gpio4>;
 		interrupts = <20 0>;
+		trickle-resistor-ohms = <250>;
+		trickle-diode-disable;
 	};
 };