ASoC: atmel_ssc_dai: add error mask define

add error mask define, which will be used when execute DMA transfer
Signed-off-by: NBo Shen <voice.shen@atmel.com>
Reviewed-by: NLars-Peter Clausen <lars@metafoo.de>
Signed-off-by: NMark Brown <broonie@linaro.org>

sound/soc/atmel/atmel_ssc_dai.c

@@ -73,6 +73,7 @@ static struct atmel_ssc_mask ssc_tx_mask = {
 	.ssc_disable	= SSC_BIT(CR_TXDIS),
 	.ssc_endx	= SSC_BIT(SR_ENDTX),
 	.ssc_endbuf	= SSC_BIT(SR_TXBUFE),
+	.ssc_error	= SSC_BIT(SR_OVRUN),
 	.pdc_enable	= ATMEL_PDC_TXTEN,
 	.pdc_disable	= ATMEL_PDC_TXTDIS,
 };
@@ -82,6 +83,7 @@ static struct atmel_ssc_mask ssc_rx_mask = {
 	.ssc_disable	= SSC_BIT(CR_RXDIS),
 	.ssc_endx	= SSC_BIT(SR_ENDRX),
 	.ssc_endbuf	= SSC_BIT(SR_RXBUFF),
+	.ssc_error	= SSC_BIT(SR_OVRUN),
 	.pdc_enable	= ATMEL_PDC_RXTEN,
 	.pdc_disable	= ATMEL_PDC_RXTDIS,
 };