ASoC: wm8997: Set symmetric samplebits on AIFs

Different playback and capture bits-per-sample
are not supported on the AIFs

Signed-off-by: Richard Fitzgerald <rf@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@linaro.org>

sound/soc/codecs/wm8997.c

@@ -967,6 +967,7 @@ static struct snd_soc_dai_driver wm8997_dai[] = {
 		 },
 		.ops = &arizona_dai_ops,
 		.symmetric_rates = 1,
+		.symmetric_samplebits = 1,
 	},
 	{
 		.name = "wm8997-aif2",
@@ -988,6 +989,7 @@ static struct snd_soc_dai_driver wm8997_dai[] = {
 		 },
 		.ops = &arizona_dai_ops,
 		.symmetric_rates = 1,
+		.symmetric_samplebits = 1,
 	},
 	{
 		.name = "wm8997-slim1",