ASoC: cs35l45: DSP Support

The CS35L45 digital core incorporates one programmable DSP block,
capable of running a wide range of audio enhancement and speaker
and battery protection functions.

Signed-off-by: Vlad Karpovich <vkarpovi@opensource.cirrus.com>
Link: https://lore.kernel.org/r/167933510679.26.5992985447093367768@mailman-core.alsa-project.org


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