add usbh_deinitialize api

core/usbh_core.c

@@ -666,6 +666,11 @@ int usbh_initialize(void)
     return 0;
 }
 
+int usbh_deinitialize(void)
+{
+    return usbh_hub_deinitialize();
+}
+
 int usbh_control_transfer(struct usbh_hubport *hport, struct usb_setup_packet *setup, uint8_t *buffer)
 {
     struct usbh_urb *urb;

core/usbh_core.h

@@ -226,6 +226,7 @@ int usbh_get_string_desc(struct usbh_hubport *hport, uint8_t index, uint8_t *out
 int usbh_set_interface(struct usbh_hubport *hport, uint8_t intf, uint8_t altsetting);
 
 int usbh_initialize(void);
+int usbh_deinitialize(void);
 void *usbh_find_class_instance(const char *devname);
 
 int lsusb(int argc, char **argv);