ASoC: Intel: sof_rt5682: use sof_hdmi_private to init HDMI

ASoC: Intel: sof_rt5682: use sof_hdmi_private to init HDMI

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

Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Brent Lu <brent.lu@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20231012190826.142619-17-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>