ASoC: Intel: Skylake: move NHLT header to common directory

ASoC: Intel: Skylake: move NHLT header to common directory

BugLink: https://bugs.launchpad.net/bugs/1837828
Prepare move from NHLT code to common directory, starting with header.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
(cherry picked from commit 63643b5902c4bf096b504b0563f5426ba5baef15)
Signed-off-by: Hui Wang <hui.wang@canonical.com>
Acked-by: Sultan Alsawaf <sultan.alsawaf@canonical.com>
Acked-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>
Signed-off-by: Kleber Sacilotto de Souza <kleber.souza@canonical.com>