ASoC: SOF: Intel: initial support for Elkhart Lake

ASoC: SOF: Intel: initial support for Elkhart Lake

Add Kconfig, PCI ID and chip info for EHL platform.

Note that the core mask is different from previous platforms, only
Core0 can be controlled by the host. Additional patches will be
required for multi-core functionality.

Signed-off-by: Pan Xiuli <xiuli.pan@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190815155749.29304-5-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>