mfd: twl4030-audio: Get audio MCLK via twl-core API instead of pdata

twl-core has API to get the boot time configured HFCLK rate which has the
same rate as the audio MCLK.
Signed-off-by: NPeter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

drivers/mfd/twl4030-audio.c

@@ -175,7 +175,7 @@ static int __devinit twl4030_audio_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	mutex_init(&audio->mutex);
-	audio->audio_mclk = pdata->audio_mclk;
+	audio->audio_mclk = twl_get_hfclk_rate();
 
 	/* Configure APLL_INFREQ and disable APLL if enabled */
 	switch (audio->audio_mclk) {