ASoC: ti: davinci-i2s: Add S32_LE as support format

ASP/McBSP can support 8/16/20/24/32 bits word in theory. I have only tested
S16_LE and S32_LE, the other formats might not work so only extend the
supported formats with S32_LE for now.
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lore.kernel.org/r/20190830103841.25128-2-peter.ujfalusi@ti.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/ti/davinci-i2s.c

@@ -612,6 +612,8 @@ static void davinci_i2s_shutdown(struct snd_pcm_substream *substream,
 }
 
 #define DAVINCI_I2S_RATES	SNDRV_PCM_RATE_8000_96000
+#define DAVINCI_I2S_FORMATS	(SNDRV_PCM_FMTBIT_S16_LE | \
+				 SNDRV_PCM_FMTBIT_S32_LE)
 
 static const struct snd_soc_dai_ops davinci_i2s_dai_ops = {
 	.shutdown	= davinci_i2s_shutdown,
@@ -639,12 +641,14 @@ static struct snd_soc_dai_driver davinci_i2s_dai = {
 		.channels_min = 2,
 		.channels_max = 2,
 		.rates = DAVINCI_I2S_RATES,
-		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
+		.formats = DAVINCI_I2S_FORMATS,
+	},
 	.capture = {
 		.channels_min = 2,
 		.channels_max = 2,
 		.rates = DAVINCI_I2S_RATES,
-		.formats = SNDRV_PCM_FMTBIT_S16_LE,},
+		.formats = DAVINCI_I2S_FORMATS,
+	},
 	.ops = &davinci_i2s_dai_ops,
 
 };