ASoC: Intel: sof_sdw_max98373: remove useless inits

No need to initialize a variable if the next line overwrites the value.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <bard.liao@intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Link: https://lore.kernel.org/r/20210802152151.15832-5-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/sof_sdw_max98373.c

@@ -90,7 +90,7 @@ static int mx8373_enable_spk_pin(struct snd_pcm_substream *substream, bool enabl
 
 static int mx8373_sdw_prepare(struct snd_pcm_substream *substream)
 {
-	int ret = 0;
+	int ret;
 
 	/* according to soc_pcm_prepare dai link prepare is called first */
 	ret = sdw_prepare(substream);
@@ -102,7 +102,7 @@ static int mx8373_sdw_prepare(struct snd_pcm_substream *substream)
 
 static int mx8373_sdw_hw_free(struct snd_pcm_substream *substream)
 {
-	int ret = 0;
+	int ret;
 
 	/* according to soc_pcm_hw_free dai link free is called first */
 	ret = sdw_hw_free(substream);