rockchip: dts: firefly: add usb host power supply node

firefly have a usb host. add dts node to provide power supply
Signed-off-by: NEddie Cai <eddie.cai.linux@gmail.com>
Acked-by: NSimon Glass <sjg@chromium.org>

arch/arm/dts/rk3288-firefly.dts

@@ -50,6 +50,11 @@
 			rockchip,pins = <7 0 RK_FUNC_GPIO &pcfg_pull_up>;
 		};
 	};
+	usb_host {
+		host_vbus_drv: host-vbus-drv {
+			rockchip,pins = <0 14 RK_FUNC_GPIO &pcfg_pull_none>;
+		};
+	};
 };
 
 &pwm1 {
@@ -61,6 +66,11 @@
 	reg-shift = <2>;
 };
 
+&usb_host1 {
+	vbus-supply = <&vcc_host_5v>;
+	status = "okay";
+};
+
 &sdmmc {
 	u-boot,dm-pre-reloc;
 };