Represent each port as machine DAPM pin widget. This helps in
enable/disable pin when monitor is connected/disconnected in case pcm
is rendered to multiple ports.

Create machine pin widgets  and pin switch kcontrol for each port and
report based on the pin status
Signed-off-by: NJeeja KP <jeeja.kp@intel.com>
Acked-by: NVinod Koul <vinod.koul@intel.com>
Signed-off-by: NMark Brown <broonie@kernel.org>