phy: rockchip-usb: add compatible values for rk3066a and rk3188

We need custom handling for these two socs in the driver shortly,
so add the necessary compatible values to binding and driver.
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Kishon Vijay Abraham I <kishon@ti.com>

Documentation/devicetree/bindings/phy/rockchip-usb-phy.txt

 ROCKCHIP USB2 PHY
 
 Required properties:
- - compatible: rockchip,rk3288-usb-phy
+ - compatible: matching the soc type, one of
+     "rockchip,rk3066a-usb-phy"
+     "rockchip,rk3188-usb-phy"
+     "rockchip,rk3288-usb-phy"
  - rockchip,grf : phandle to the syscon managing the "general
    register files"
  - #address-cells: should be 1

drivers/phy/phy-rockchip-usb.c

@@ -176,6 +176,8 @@ static int rockchip_usb_phy_probe(struct platform_device *pdev)
 }
 
 static const struct of_device_id rockchip_usb_phy_dt_ids[] = {
+	{ .compatible = "rockchip,rk3066a-usb-phy" },
+	{ .compatible = "rockchip,rk3188-usb-phy" },
 	{ .compatible = "rockchip,rk3288-usb-phy" },
 	{}
 };