ASoC: Intel: Skylake: Report Platform ID info from NHLT

This patch create entry in sysfs file system to report the
platform_id = "pci-id-oem_id-oem_table_id-oem_revision"
for board identification.

Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Signed-off-by: Sodhi, VunnyX <vunnyx.sodhi@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>