ASoC: SOF: topology: Fix memory leak in sof_control_load()

scontrol doesn't get freed when kstrdup returns NULL.
Fix by free iscontrol in that case.

     scontrol = kzalloc(sizeof(*scontrol), GFP_KERNEL);
     if (!scontrol)
         return -ENOMEM;

     scontrol->name = kstrdup(hdr->name, GFP_KERNEL);
     if (!scontrol->name)
         return -ENOMEM;

Signed-off-by: Yu Liao <liaoyu15@huawei.com>
Link: https://lore.kernel.org/r/20220318021616.2599630-1-liaoyu15@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>

sound/soc/sof/topology.c

@@ -904,8 +904,10 @@ static int sof_control_load(struct snd_soc_component *scomp, int index,
 		return -ENOMEM;
 
 	scontrol->name = kstrdup(hdr->name, GFP_KERNEL);
-	if (!scontrol->name)
+	if (!scontrol->name) {
+		kfree(scontrol);
 		return -ENOMEM;
+	}
 
 	scontrol->scomp = scomp;
 	scontrol->access = kc->access;