ARM: dts: rockchip: add reset property for rk3066a-rayeager emac phy

The ethernet phy of rk3066a-rayeager has a reset pin, it controlled by
GPIO1_D6, this pin should be pull down then pull up to reset the phy.
Add a reset-gpios property in phy0, make the phy can be reset when emac
power on.
Signed-off-by: Chris Zhong <zyw@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3066a-rayeager.dts

@@ -177,6 +177,7 @@ &emac {
 
 	phy0: ethernet-phy@0 {
 		reg = <0>;
+		reset-gpios = <&gpio1 RK_PD6 GPIO_ACTIVE_LOW>;
 	};
 };