ARM: OMAP: McBSP: Merge two functions into omap_mcbsp_start/_stop

Functionality of functions omap_mcbsp_xmit_enable and omap_mcbsp_recv_enable
can be merged into omap_mcbsp_start and omap_mcbsp_stop since API of
those omap_mcbsp_start and omap_mcbsp_stop was changed recently allowing
to start and stop individually the transmitter and receiver.

This cleans up the code in arch/arm/plat-omap/mcbsp.c and in
sound/soc/omap/omap-mcbsp.c which was the only user for those removed
functions.

Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>
Acked-by: Eero Nurkkala <ext-eero.nurkkala@nokia.com>
Cc: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/omap/omap-mcbsp.c

@@ -231,11 +231,6 @@ static int omap_mcbsp_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 		mcbsp_data->active++;
 		omap_mcbsp_start(mcbsp_data->bus_id, play, !play);
-		/* Make sure data transfer is frame synchronized */
-		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-			omap_mcbsp_xmit_enable(mcbsp_data->bus_id, 1);
-		else
-			omap_mcbsp_recv_enable(mcbsp_data->bus_id, 1);
 		break;
 
 	case SNDRV_PCM_TRIGGER_STOP: