ASoC: Intel: skl_hda_dsp_generic: use sof_hdmi_private to init HDMI

Use sof_hdmi_private structure instead of a link list of
skl_hda_hdmi_pcm structure for HDMI dai link initialization since
hdac-hdmi support is removed.

Signed-off-by: Brent Lu <brent.lu@intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://patch.msgid.link/20240827123215.258859-14-yung-chuan.liao@linux.intel.com


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