ASoC: hdac_hdmi: Drop support for Icelake

This reverts commit 019033c8 ("ASoC: Intel: hdac_hdmi:
add Icelake support").

Icelake HDMI audio is supported by the HDMI codec driver,
which can be used both in non-DSP (legacy HDA) and with
DSP (SOF) configurations.

Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20191126145304.24204-4-pierre-louis.bossart@linux.intel.com


Signed-off-by: Mark Brown <broonie@kernel.org>