ARM: dts: rockchip: add usb phys to Cortex-A9 socs

This adds the usbphy nodes to rk3066 and rk3188, which share the usb hosts
in rk3xxx.dtsi and also enables it on boards based around these socs.

The usb-phy itself is the same as used on the rk3288 already.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>