ARM: dts: rockchip: remove usb-phy fallback string from rk3066a/rk3188

With the conversion of rockchip-usb-phy.yaml a long time used fallback
string for rk3066a/rk3188 was added. The linux driver doesn't do much with
the GRF phy address range, however the u-boot driver rockchip_usb2_phy.c
does. The bits in GRF_UOC0_CON2 for rk3066a/rk3188 and rk3288 for example
don't match. Remove the usb-phy fallback string for rk3066a/rk3188
to prevent possible strange side effects.
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20210828111218.10026-2-jbx6244@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm/boot/dts/rk3066a.dtsi

@@ -681,8 +681,7 @@ &grf {
 	compatible = "rockchip,rk3066-grf", "syscon", "simple-mfd";
 
 	usbphy: usbphy {
-		compatible = "rockchip,rk3066a-usb-phy",
-			     "rockchip,rk3288-usb-phy";
+		compatible = "rockchip,rk3066a-usb-phy";
 		#address-cells = <1>;
 		#size-cells = <0>;
 		status = "disabled";

arch/arm/boot/dts/rk3188.dtsi

@@ -647,8 +647,7 @@ io_domains: io-domains {
 	};
 
 	usbphy: usbphy {
-		compatible = "rockchip,rk3188-usb-phy",
-			     "rockchip,rk3288-usb-phy";
+		compatible = "rockchip,rk3188-usb-phy";
 		#address-cells = <1>;
 		#size-cells = <0>;
 		status = "disabled";