ASoC: Intel: Add Skylake HDA audio driver

This patch follows up by adding the HDA controller operations. This
code is mostly derived from Intel HDA PCI driver without legacy bits
Signed-off-by: Jeeja KP <jeeja.kp@intel.com>
Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>