[media] s5p_cec: get rid of an unused var

drivers/staging/media/s5p-cec/s5p_cec.c: In function 's5p_cec_adap_enable':
drivers/staging/media/s5p-cec/s5p_cec.c:42:6: warning: variable 'ret' set but not used [-Wunused-but-set-variable]
  int ret;
      ^~~
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/staging/media/s5p-cec/s5p_cec.c

@@ -39,10 +39,9 @@ MODULE_PARM_DESC(debug, "debug level (0-2)");
 static int s5p_cec_adap_enable(struct cec_adapter *adap, bool enable)
 {
 	struct s5p_cec_dev *cec = adap->priv;
-	int ret;
 
 	if (enable) {
-		ret = pm_runtime_get_sync(cec->dev);
+		pm_runtime_get_sync(cec->dev);
 
 		s5p_cec_reset(cec);