ASoC: omap-mcbsp: Remove unused FRAME dma_op_mode

The frame dma_op_mode has never been used, and it is just creating
confusion for users/developers.

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

sound/soc/omap/mcbsp.c

@@ -754,7 +754,7 @@ THRESHOLD_PROP_BUILDER(max_tx_thres);
 THRESHOLD_PROP_BUILDER(max_rx_thres);
 
 static const char *dma_op_modes[] = {
-	"element", "threshold", "frame",
+	"element", "threshold",
 };
 
 static ssize_t dma_op_mode_show(struct device *dev,

sound/soc/omap/mcbsp.h

@@ -217,7 +217,6 @@ enum {
 /********************** McBSP DMA operating modes **************************/
 #define MCBSP_DMA_MODE_ELEMENT		0
 #define MCBSP_DMA_MODE_THRESHOLD	1
-#define MCBSP_DMA_MODE_FRAME		2
 
 /********************** McBSP WAKEUPEN bit definitions *********************/
 #define RSYNCERREN		BIT(0)

sound/soc/omap/omap-mcbsp.c

@@ -245,7 +245,6 @@ static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
 	}
 	if (mcbsp->pdata->buffer_size) {
 		dma_data->set_threshold = omap_mcbsp_set_threshold;
-		/* TODO: Currently, MODE_ELEMENT == MODE_FRAME */
 		if (mcbsp->dma_op_mode == MCBSP_DMA_MODE_THRESHOLD) {
 			int period_words, max_thrsh;