ASoC: SOF: Intel: enable dmic handling with 2 or fewer SoundWire links

ASoC: SOF: Intel: enable dmic handling with 2 or fewer SoundWire links

When PCH-attached DMICs are used on a SoundWire-based platform, all
known devices pin-mux SoundWire link2 and link3 with DMIC, and only
use link0 and link1 for SoundWire.

The HP Omen16 is the first exception to the rule, with SoundWire using
link0 and link3. Rather than using a fixed mask, let's count the
number of SoundWire links used.

BugLink: https://github.com/thesofproject/sof/issues/5966
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220715144144.274770-5-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>