arm64: dts: rockchip: fix phy nodename for rk3328

A test with the command below gives for example this error:

arch/arm64/boot/dts/rockchip/rk3328-evb.dt.yaml: phy@0:
'#phy-cells' is a required property

The phy nodename is normally used by a phy-handle.
This node is however compatible with
"ethernet-phy-id1234.d400", "ethernet-phy-ieee802.3-c22"
which is just been added to 'ethernet-phy.yaml'.
So change nodename to 'ethernet-phy' for which '#phy-cells'
is not a required property

make ARCH=arm64 dtbs_check
DT_SCHEMA_FILES=~/.local/lib/python3.5/site-packages/dtschema/schemas/
phy/phy-provider.yaml
Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20200321215423.12176-1-jbx6244@gmail.comSigned-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3328.dtsi

@@ -936,7 +936,7 @@ mdio {
 			#address-cells = <1>;
 			#size-cells = <0>;
 
-			phy: phy@0 {
+			phy: ethernet-phy@0 {
 				compatible = "ethernet-phy-id1234.d400", "ethernet-phy-ieee802.3-c22";
 				reg = <0>;
 				clocks = <&cru SCLK_MAC2PHY_OUT>;