ASoC: Intel: kbl: Add new FEs for Multi-Playback & Echo-Reference

Adding new frontends to support:
1. Parallel playback on 2 ports simultaneously
2. Echo reference capture capability

Signed-off-by: Naveen M <naveen.m@intel.com>
Signed-off-by: Sathya Prakash M R <sathya.prakash.m.r@intel.com>
Acked-By: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>