ASoC: Intel: Skylake: Add IPC to configure the copier secondary pins

Copier can support upto 4 output pins. However, only pin 0 is configured
as a part of copier initialization. Configuring rest of pins require the
separate IPC to be sent to fw.

Signed-off-by: Pradeep Tewani <pradeep.d.tewani@intel.com>
Acked-By: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>