ASoC: fsl-asoc-card: Add optional dt property for setting mclk-id

Sound cards may allow using different main clock inputs. In the generic
fsl-asoc-card driver, these values are hardcoded for each specific card
configuration.

Let's make it more flexible, allowing setting mclk-id from the
device-tree node. Otherwise, the default value for each card
configuration is used.

Signed-off-by: Ariel D'Alessandro <ariel.dalessandro@collabora.com>
Link: https://lore.kernel.org/r/20220117132109.283365-5-ariel.dalessandro@collabora.com


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