Adds the codec driver for the CS47L92 SmartCodec. This is a
multi-functional codec based on the Cirrus Logic Madera platform.
Signed-off-by: NStuart Henderson <stuarth@opensource.wolfsonmicro.com>
Signed-off-by: NCharles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20190725163931.24964-3-ckeepax@opensource.cirrus.comSigned-off-by: NMark Brown <broonie@kernel.org>