Add dummy support for SAI/ESAI digital audio interface
IPs found on i.MX8 boards.
Signed-off-by: NDaniel Baluta <daniel.baluta@nxp.com>
Signed-off-by: NPierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190815192018.30570-2-pierre-louis.bossart@linux.intel.comSigned-off-by: NMark Brown <broonie@kernel.org>