staging: usbip: userspace: add new list API
staging: usbip: userspace: add new list API

Take the linked list implementation from the Linux Kernel
and strip it down to what it is needed.

Signed-off-by: Valentina Manea <b65fbce2db68cabc5fb74ad65f0c94cef8963ea9@gmail.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs