qrtr: Return success if control port is not bound

If a port tries to send a message before the name service binds to the
control port, then that message should succeed. This will allow clients
to operate normally until the name service comes online and causes a
net reset to restart all the ports.

Change-Id: Ica0a5e45df0e51f282e5bf426d11ff8e41b339c4
Signed-off-by: Chris Lew <clew@codeaurora.org>