OMAP4: mcbsp: Enable FIFO usage

All McBSP instances on OMAP4 has 128 word long FIFO
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Acked-by: NTony Lindgren <tony@atomide.com>
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>

arch/arm/mach-omap2/mcbsp.c

@@ -153,6 +153,9 @@ static int omap_init_mcbsp(struct omap_hwmod *oh, void *unused)
 		else
 			/* The FIFO has 128 locations */
 			pdata->buffer_size = 0x80;
+	} else if (oh->class->rev == MCBSP_CONFIG_TYPE4) {
+		/* The FIFO has 128 locations for all instances */
+		pdata->buffer_size = 0x80;
 	}
 
 	if (oh->class->rev >= MCBSP_CONFIG_TYPE3)