arm64: dts: rockchip: add reset property for dwc3 controllers on rk3399

After commit '06c47e6286d usb: dwc3: of-simple: Add support to get resets
for the device' you can add the reset property to the dwc3 node, the reset
is required for the controller to work properly, otherwise bind / unbind
stress testing of the USB controller on rk3399 we'd often end up with lots
of failures that looked like this:

phy phy-ff800000.phy.9: phy poweron failed --> -110
dwc3 fe900000.dwc3: failed to initialize core
dwc3: probe of fe900000.dwc3 failed with error -110

Signed-off-by: Enric Balletbo i Serra <[e-mail]>
Signed-off-by: Heiko Stuebner <[e-mail]>

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

···
 		clock-names = "ref_clk", "suspend_clk",
 			      "bus_clk", "aclk_usb3_rksoc_axi_perf",
 			      "aclk_usb3", "grf_clk";
+		resets = <&cru SRST_A_USB3_OTG0>;
+		reset-names = "usb3-otg";
 		status = "disabled";
 
 		usbdrd_dwc3_0: dwc3 {
···
 		clock-names = "ref_clk", "suspend_clk",
 			      "bus_clk", "aclk_usb3_rksoc_axi_perf",
 			      "aclk_usb3", "grf_clk";
+		resets = <&cru SRST_A_USB3_OTG1>;
+		reset-names = "usb3-otg";
 		status = "disabled";
 
 		usbdrd_dwc3_1: dwc3 {