if enabled with '-x' option starts jackd with all devices closed, when
configured, user must provide number of channels for all devices, otherwise
we would not be able to create any jack ports.

we need to create all jack ports, since the only way to start any device
in this condition is to connect a jack port and issue a call
jack_client_reload_master

Change-Id: I63736eff20a2f2db7405ad512fec11e7bd0a9860
Signed-off-by: Adam Miartus <amiartus@de.adit-jv.com>
(cherry picked from commit 55d03f05d0)
Signed-off-by: Timo Wischer <twischer@de.adit-jv.com>