usb: implement attach kernel driver

[aokblast]

Summary

FreeBSD's USB framework supports detaching kernel drivers to allow
user space applications to exclusively claim USB interfaces. However,
it lacked support for reattaching the kernel driver afterward.

This commit adds the missing functionality, enabling user space
to return control of the device back to the kernel.

Sponsored by: The FreeBSD Foundation

Test Plan

Tested by usbconfig detach_kernel_driver a keyboard and reattach it.

[aokblast]

Fix style nit

[lwhsu]

I think we also need to update usbconfig(8).

lib/libusb/libusb10.c

1055

lib/libusb/libusb20_ugen20.c

728

sys/dev/usb/usb_ioctl.h

276–277

usr.sbin/usbconfig/usbconfig.c

505

[lwhsu]

lib/libusb/libusb20.h

249

[aokblast]

Minor fixes and add usbcnfig document

[lwhsu]

sys/dev/usb/usb_device.h

315 ↗

(On Diff #160875)

There seems no usb_attach_device() definition? Is the diff of usb_device.c forgot to upload?

[aokblast]

sys/dev/usb/usb_device.h

315 ↗

(On Diff #160875)

No attach actually, it is called usb_probe_and_attach. I will delete that later.

[emaste]

lib/libusb/libusb.h

204–205

or if you prefer, supports detching with libusb_detach_...() and attaching with libusb_attach_...().

[aokblast]

Minor fixes

[lwhsu]

Oh, it would be better to have the subject like usb: Implement attach kernel driver function or feature or so.