v4l2: Ignores V4L2_CAP_DEVICE_CAPS
Created by: ndufresne
When this flag is set, the device_caps member should be looked up instead of capabilities. This is because capabilities is the combination of all the caps supported by the driver. A driver that implement multiple device (capture, output, etc.) might be miss-detected.
https://linuxtv.org/downloads/v4l-dvb-apis/uapi/v4l/vidioc-querycap.html