[PATCH] fix ifnullfree.cocci warnings

[Julia Lawall]

From: kbuild test robot <fengguang...@intel.com>

 NULL check before some freeing functions is not needed.

 Based on checkpatch warning
 "kfree(NULL) is safe this check is probably not required"
 and kfreeaddr.cocci by Julia Lawall.

Generated by: scripts/coccinelle/free/ifnullfree.cocci

Fixes: 0099cc17a399 ("ASoC:topology:avoid error log and oops during topology 
free.")
Signed-off-by: kbuild test robot <fengguang...@intel.com>
Signed-off-by: Julia Lawall <julia.law...@lip6.fr>
---

Feel free to ignore this if the null test is useful in some way.

 topology.c |    3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

--- a/sound/soc/sof/topology.c
+++ b/sound/soc/sof/topology.c
@@ -2165,8 +2165,7 @@ void snd_sof_free_topology(struct snd_so
                /* free sroute and its private data */
                kfree(sroute->route->source);
                kfree(sroute->route->sink);
-               if (sroute->route->control)
-                       kfree(sroute->route->control);
+               kfree(sroute->route->control);
                kfree(sroute->route);
                kfree(sroute->private);
                kfree(sroute);