Adds the codec driver for the CS47L90 SmartCodec. This is a
multi-functional codec based on the Cirrus Logic Madera platform.
Signed-off-by: NNikesh Oswal <nikesh@opensource.cirrus.com>
Signed-off-by: NRichard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: NCharles Keepax <ckeepax@opensource.cirrus.com>
Signed-off-by: NMark Brown <broonie@kernel.org>