ASoC: cs47l15: Add codec driver for Cirrus Logic CS47L15

Adds the codec driver for the CS47L15 SmartCodec. This is a
multi-functional codec based on the Cirrus Logic Madera platform.

Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
Signed-off-by: Jaswinder Jassal <jjassal@opensource.wolfsonmicro.com>
Signed-off-by: Charles Keepax <ckeepax@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20190725163931.24964-2-ckeepax@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/madera.c

@@ -1041,6 +1041,10 @@ static void madera_configure_input_mode(struct madera *madera)
 	int max_analogue_inputs, max_dmic_sup, i;
 
 	switch (madera->type) {
+	case CS47L15:
+		max_analogue_inputs = 1;
+		max_dmic_sup = 2;
+		break;
 	case CS47L35:
 		max_analogue_inputs = 2;
 		max_dmic_sup = 2;