ARM: dts: bcm2711: Add reset controller to xHCI node

The chip is hardwired to the board's PCIe bus and needs to be properly
setup trough a firmware routine after a PCI fundamental reset. Pass the
reset controller phandle that takes care of triggering the
initialization to the relevant PCI device.
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
Link: https://lore.kernel.org/r/20200629161845.6021-5-nsaenzjulienne@suse.deSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

arch/arm/boot/dts/bcm2711-rpi-4-b.dts

@@ -4,6 +4,8 @@
 #include "bcm2835-rpi.dtsi"
 #include "bcm283x-rpi-usb-peripheral.dtsi"
 
+#include <dt-bindings/reset/raspberrypi,firmware-reset.h>
+
 / {
 	compatible = "raspberrypi,4-model-b", "brcm,bcm2711";
 	model = "Raspberry Pi 4 Model B";
@@ -212,6 +214,21 @@ phy1: ethernet-phy@1 {
 	};
 };
 
+&pcie0 {
+	pci@1,0 {
+		#address-cells = <3>;
+		#size-cells = <2>;
+		ranges;
+
+		reg = <0 0 0 0 0>;
+
+		usb@1,0 {
+			reg = <0x10000 0 0 0 0>;
+			resets = <&reset RASPBERRYPI_FIRMWARE_RESET_ID_USB>;
+		};
+	};
+};
+
 /* uart0 communicates with the BT module */
 &uart0 {
 	pinctrl-names = "default";