ASoC: Add ADAU1372 audio CODEC support

Add support for the Analog Devices ADAU1372 audio CODEC.

[Alexandre Belloni: allow 32kHz for TDM4 in slave mode]

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20201127123030.1610574-2-alexandre.belloni@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>