ASoC: ti: omap-mcbsp: remove useless assignment

sound/soc/ti/omap-mcbsp.c:617:10: style: Variable 'ret' is assigned a
value that is never used. [unreadVariable]
 int ret = 0;
         ^
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Reviewed-by: Chao Song <chao.song@intel.com>
Link: https://lore.kernel.org/r/20220822184239.169757-6-pierre-louis.bossart@linux.intel.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/ti/omap-mcbsp.c

@@ -614,7 +614,7 @@ static int omap_mcbsp_init(struct platform_device *pdev)
 {
 	struct omap_mcbsp *mcbsp = platform_get_drvdata(pdev);
 	struct resource *res;
-	int ret = 0;
+	int ret;
 
 	spin_lock_init(&mcbsp->lock);
 	mcbsp->free = true;