ASoC: SOF: Introduce struct snd_sof_dai_link

Introduce a new struct for DAI links to save the DAI link information
parsed from topology. Also add a list of dai_links to struct snd_sof_dev
that will be populated during topology parsing.

Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20220314200520.1233427-2-ranjani.sridharan@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>