ASoC: Intel: bytcht_cx2072x: simplify return handling

Fix cppcheck warning:

sound/soc/intel/boards/bytcht_cx2072x.c:102:9: warning: Identical
condition and return expression 'ret', return value is always 0
[identicalConditionAfterEarlyExit]
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200813175839.59422-5-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/bytcht_cx2072x.c

@@ -99,7 +99,7 @@ static int byt_cht_cx2072x_init(struct snd_soc_pcm_runtime *rtd)
 
 	snd_soc_dai_set_bclk_ratio(asoc_rtd_to_codec(rtd, 0), 50);
 
-	return ret;
+	return 0;
 }
 
 static int byt_cht_cx2072x_fixup(struct snd_soc_pcm_runtime *rtd,