arm64: dts: rockchip: add u2phy clock for ehci and ohci of rk3399

We found that the suspend process was blocked when it run into
ehci/ohci module due to clk-480m of usb2-phy was disabled.

The root cause is that usb2-phy suspended earlier than ehci/ohci
(usb2-phy will be auto suspended if no devices plug-in). and the
clk-480m provided by it was disabled if no module used. However,
some suspend process related ehci/ohci are base on this clock,
so we should refer it into ehci/ohci driver to prevent this case.

The u2phy clock flow like this:
===
      u2phy ________________
           |                |    |-----> UTMI_CLK ---------> | EHCI |
OSC_24M ---|---> PHY_PLL----|----|
           |________^_______|    |-----> 480M_CLK ---|G|---> | USBPHY_480M_SRC| ----> USBPHY_480M for SoC
                    |
                    |
                   GRF
===
Signed-off-by: William wu <wulf@rock-chips.com>
Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

arch/arm64/boot/dts/rockchip/rk3399.dtsi

@@ -321,8 +321,10 @@ usb_host0_ehci: usb@fe380000 {
 		compatible = "generic-ehci";
 		reg = <0x0 0xfe380000 0x0 0x20000>;
 		interrupts = <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH 0>;
-		clocks = <&cru HCLK_HOST0>, <&cru HCLK_HOST0_ARB>;
-		clock-names = "hclk_host0", "hclk_host0_arb";
+		clocks = <&cru HCLK_HOST0>, <&cru HCLK_HOST0_ARB>,
+			 <&u2phy0>;
+		clock-names = "usbhost", "arbiter",
+			      "utmi";
 		phys = <&u2phy0_host>;
 		phy-names = "usb";
 		status = "disabled";
@@ -332,8 +334,12 @@ usb_host0_ohci: usb@fe3a0000 {
 		compatible = "generic-ohci";
 		reg = <0x0 0xfe3a0000 0x0 0x20000>;
 		interrupts = <GIC_SPI 28 IRQ_TYPE_LEVEL_HIGH 0>;
-		clocks = <&cru HCLK_HOST0>, <&cru HCLK_HOST0_ARB>;
-		clock-names = "hclk_host0", "hclk_host0_arb";
+		clocks = <&cru HCLK_HOST0>, <&cru HCLK_HOST0_ARB>,
+			 <&u2phy0>;
+		clock-names = "usbhost", "arbiter",
+			      "utmi";
+		phys = <&u2phy0_host>;
+		phy-names = "usb";
 		status = "disabled";
 	};
 
@@ -341,8 +347,10 @@ usb_host1_ehci: usb@fe3c0000 {
 		compatible = "generic-ehci";
 		reg = <0x0 0xfe3c0000 0x0 0x20000>;
 		interrupts = <GIC_SPI 30 IRQ_TYPE_LEVEL_HIGH 0>;
-		clocks = <&cru HCLK_HOST1>, <&cru HCLK_HOST1_ARB>;
-		clock-names = "hclk_host1", "hclk_host1_arb";
+		clocks = <&cru HCLK_HOST1>, <&cru HCLK_HOST1_ARB>,
+			 <&u2phy1>;
+		clock-names = "usbhost", "arbiter",
+			      "utmi";
 		phys = <&u2phy1_host>;
 		phy-names = "usb";
 		status = "disabled";
@@ -352,8 +360,12 @@ usb_host1_ohci: usb@fe3e0000 {
 		compatible = "generic-ohci";
 		reg = <0x0 0xfe3e0000 0x0 0x20000>;
 		interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH 0>;
-		clocks = <&cru HCLK_HOST1>, <&cru HCLK_HOST1_ARB>;
-		clock-names = "hclk_host1", "hclk_host1_arb";
+		clocks = <&cru HCLK_HOST1>, <&cru HCLK_HOST1_ARB>,
+			 <&u2phy1>;
+		clock-names = "usbhost", "arbiter",
+			      "utmi";
+		phys = <&u2phy1_host>;
+		phy-names = "usb";
 		status = "disabled";
 	};