arm64: dts: marvell: armada-37xx: declare USB2 UTMI PHYs

On Marvell Armada 3700 SoCs there are two USB2 UTMI PHYs. They are
both very similar but only one has OTG/charging capabilities.

Because there are USB host registers and PHY registers mixed in a
single area, a system controller is also created and referenced from
both the USB host node and the PHY node.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

arch/arm64/boot/dts/marvell/armada-37xx.dtsi

@@ -305,18 +305,46 @@ usb3: usb@58000 {
 				compatible = "marvell,armada3700-xhci",
 				"generic-xhci";
 				reg = <0x58000 0x4000>;
+				marvell,usb-misc-reg = <&usb32_syscon>;
 				interrupts = <GIC_SPI 3 IRQ_TYPE_LEVEL_HIGH>;
 				clocks = <&sb_periph_clk 12>;
 				status = "disabled";
 			};
 
+			usb2_utmi_otg_phy: phy@5d000 {
+				compatible = "marvell,a3700-utmi-otg-phy";
+				reg = <0x5d000 0x800>;
+				marvell,usb-misc-reg = <&usb32_syscon>;
+				#phy-cells = <0>;
+			};
+
+			usb32_syscon: system-controller@5d800 {
+				compatible = "marvell,armada-3700-usb2-host-device-misc",
+				"syscon";
+				reg = <0x5d800 0x800>;
+			};
+
 			usb2: usb@5e000 {
 				compatible = "marvell,armada-3700-ehci";
 				reg = <0x5e000 0x1000>;
+				marvell,usb-misc-reg = <&usb2_syscon>;
 				interrupts = <GIC_SPI 17 IRQ_TYPE_LEVEL_HIGH>;
 				status = "disabled";
 			};
 
+			usb2_utmi_host_phy: phy@5f000 {
+				compatible = "marvell,a3700-utmi-host-phy";
+				reg = <0x5f000 0x800>;
+				marvell,usb-misc-reg = <&usb2_syscon>;
+				#phy-cells = <0>;
+			};
+
+			usb2_syscon: system-controller@5f800 {
+				compatible = "marvell,armada-3700-usb2-host-misc",
+				"syscon";
+				reg = <0x5f800 0x800>;
+			};
+
 			xor@60900 {
 				compatible = "marvell,armada-3700-xor";
 				reg = <0x60900 0x100>,