ASOC: Intel: kbl_rt5663_rt5514_max98927: remove useless initialization

Fix cppcheck warning:

[sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c:764]: (style)
Variable 'ret' is assigned a value that is never used.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200113210428.27457-13-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c

@@ -761,7 +761,7 @@ static int kabylake_audio_probe(struct platform_device *pdev)
 {
 	struct kbl_codec_private *ctx;
 	struct snd_soc_acpi_mach *mach;
-	int ret = 0;
+	int ret;
 
 	ctx = devm_kzalloc(&pdev->dev, sizeof(*ctx), GFP_KERNEL);
 	if (!ctx)