This patch enables HDMI support in passthrough mode in skylake.
Skylake supports 3 pin widgets in HDMI codec, so add 3 FE and 3
BE dais

Add required hw info, formats, rates to support HDMI.
Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>