ASoC: atmel_ssc_dai: implement left-justified data mode

Enable support for left-justified data mode for SSC-codec link.
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Link: https://lore.kernel.org/r/44fa6b700421e80778f20ff9ead2b148cf6d2e92.1566677788.git.mirq-linux@rere.qmqm.plSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/atmel/atmel_ssc_dai.c

@@ -564,6 +564,15 @@ static int atmel_ssc_hw_params(struct snd_pcm_substream *substream,
 
 	switch (ssc_p->daifmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 
+	case SND_SOC_DAIFMT_LEFT_J:
+		fs_osync = SSC_FSOS_POSITIVE;
+		fs_edge = SSC_START_RISING_RF;
+
+		rcmr =	  SSC_BF(RCMR_STTDLY, 0);
+		tcmr =	  SSC_BF(TCMR_STTDLY, 0);
+
+		break;
+
 	case SND_SOC_DAIFMT_I2S:
 		fs_osync = SSC_FSOS_NEGATIVE;
 		fs_edge = SSC_START_FALLING_RF;