ASoC: SAMSUNG: Fix initial return value

This patch fixed intial return value to be a '0' as asuccess on
set_audio_clock_heirachy(). This avoids unintended error on initialize.

Signed-off-by: Seungwhan Youn <sw.youn@samsung.com>
Acked-by: Jassi Brar <jassi.brar@samsung.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/samsung/smdk_spdif.c

@@ -28,7 +28,7 @@
 static int set_audio_clock_heirachy(struct platform_device *pdev)
 {
 	struct clk *fout_epll, *mout_epll, *sclk_audio0, *sclk_spdif;
-	int ret;
+	int ret = 0;
 
 	fout_epll = clk_get(NULL, "fout_epll");
 	if (IS_ERR(fout_epll)) {