ASoC: davinci: don't use clock names

clock name strings are no longer passed on platform_data.  Instead,
we rely entirely on struct device and clkdev to find the right clock.

Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
diff --git a/sound/soc/davinci/davinci-mcasp.c b/sound/soc/davinci/davinci-mcasp.c
index b27aab6..f0c0347 100644
--- a/sound/soc/davinci/davinci-mcasp.c
+++ b/sound/soc/davinci/davinci-mcasp.c
@@ -764,7 +764,7 @@
 	}
 
 	pdata = pdev->dev.platform_data;
-	dev->clk = clk_get(&pdev->dev, pdata->clk_name);
+	dev->clk = clk_get(&pdev->dev, NULL);
 	if (IS_ERR(dev->clk)) {
 		ret = -ENODEV;
 		goto err_release_region;