wimax_msg_send — Send a pre-allocated message to user space
Sends a free-form message that was preallocated with
wimax_msg_alloc and filled up.
Assumes that once you pass an skb to this function for sending, it owns it and will release it when done (on success).
Unlike other WiMAX stack calls, this call can be used way early,
wimax_dev_add is called, as long as the
wimax_dev->net_dev pointer is set to point to a proper
net_dev. This is so that drivers can use it early in case they need
to send stuff around or communicate with user space.