make menuconfig

  │ Symbol: USB_CONFIGFS_F_UVC [=n]                                                   │
  │ Type  : boolean                                                                   │
  │ Prompt: USB Webcam function                                                       │
  │   Location:                                                                       │
  │     -> Device Drivers                                                             │
  │       -> USB support (USB_SUPPORT [=y])                                           │
  │         -> USB Gadget Support (USB_GADGET [=y])                                   │
  │           -> USB Gadget Drivers (<choice> [=m])                                   │
  │ (1)         -> USB functions configurable through configfs (USB_CONFIGFS [=m])    │
  │   Defined at drivers/usb/gadget/Kconfig:426                                       │
  │   Depends on: <choice> && USB_CONFIGFS [=m] && VIDEO_DEV [=n]                     │
  │   Selects: VIDEOBUF2_VMALLOC [=n] && USB_F_UVC [=n]                               │
  │                                                                                   │
  │                                                                                   │
  │ Symbol: USB_F_UVC [=n]                                                            │
  │ Type  : tristate