ASoC: omap-mcbsp: Use the common interrupt line if supported by the SoC

With the common irq the driver only needs to use one interrupt line, and
it provides better debugging possibilites compared to the legacy TX/RX
interrupt lines.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@ti.com>

sound/soc/omap/mcbsp.h

@@ -218,15 +218,19 @@ enum {
 #define MCBSP_DMA_MODE_ELEMENT		0
 #define MCBSP_DMA_MODE_THRESHOLD	1
 
-/********************** McBSP WAKEUPEN bit definitions *********************/
+/********************** McBSP WAKEUPEN/IRQST/IRQEN bit definitions *********/
 #define RSYNCERREN		BIT(0)
 #define RFSREN			BIT(1)
 #define REOFEN			BIT(2)
 #define RRDYEN			BIT(3)
+#define RUNDFLEN		BIT(4)
+#define ROVFLEN			BIT(5)
 #define XSYNCERREN		BIT(7)
 #define XFSXEN			BIT(8)
 #define XEOFEN			BIT(9)
 #define XRDYEN			BIT(10)
+#define XUNDFLEN		BIT(11)
+#define XOVFLEN			BIT(12)
 #define XEMPTYEOFEN		BIT(14)
 
 /* Clock signal muxing options */
@@ -294,6 +298,7 @@ struct omap_mcbsp {
 	int configured;
 	u8 free;
 
+	int irq;
 	int rx_irq;
 	int tx_irq;