ASoC: Intel: sof_realtek_common: set ret = 0 as initial value

'ret' will not be initialized if dai_fmt is not DSP_A or DSP_B.
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20221206212507.359993-4-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/sof_realtek_common.c

@@ -267,7 +267,8 @@ static int rt1015_hw_params(struct snd_pcm_substream *substream,
 	struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
 	struct snd_soc_dai_link *dai_link = rtd->dai_link;
 	struct snd_soc_dai *codec_dai;
-	int i, clk_freq, ret;
+	int i, clk_freq;
+	int ret = 0;
 
 	clk_freq = sof_dai_get_bclk(rtd);