ASoC: Enforce symmetric rates for S3C64xx I2S interface

There is only one LRCLK pin on each interface.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/s3c24xx/s3c64xx-i2s.c b/sound/soc/s3c24xx/s3c64xx-i2s.c
index a84c4be..c335248 100644
--- a/sound/soc/s3c24xx/s3c64xx-i2s.c
+++ b/sound/soc/s3c24xx/s3c64xx-i2s.c
@@ -171,6 +171,7 @@
 			 .formats	= S3C64XX_I2S_FMTS,
 		 },
 		.ops = &s3c64xx_i2s_dai_ops,
+		.symmetric_rates = 1,
 	},
 	{
 		.name		= "s3c64xx-i2s",
@@ -189,6 +190,7 @@
 			 .formats	= S3C64XX_I2S_FMTS,
 		 },
 		.ops = &s3c64xx_i2s_dai_ops,
+		.symmetric_rates = 1,
 	},
 };
 EXPORT_SYMBOL_GPL(s3c64xx_i2s_dai);