ASoC: core: Remove useless kfree

Author: Peter Senna Tschudin <peter.senna@gmail.com>

Remove useless kfree() and clean up code related to the removal.

The semantic patch that finds this problem is as follows:
(http://coccinelle.lip6.fr/)

// 
@r exists@
position p1,p2;
expression x;
@@

if (x@p1 == NULL) { ... kfree@p2(x); ... return ...; }

@unchanged exists@
position r.p1,r.p2;
expression e <= r.x,x,e1;
iterator I;
statement S;
@@

if (x@p1 == NULL) { ... when != I(x,...) S
                        when != e = e1
                        when != e += e1
                        when != e -= e1
                        when != ++e
                        when != --e
                        when != e++
                        when != e--
                        when != &e
   kfree@p2(x); ... return ...; }

@ok depends on unchanged exists@
position any r.p1;
position r.p2;
expression x;
@@

... when != true x@p1 == NULL
kfree@p2(x);

@depends on !ok && unchanged@
position r.p2;
expression x;
@@

*kfree@p2(x);
// 

Signed-off-by: Peter Senna Tschudin 
Signed-off-by: Mark Brown 

---
 sound/soc/soc-core.c | 2 --
 1 file changed, 2 deletions(-)
 
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index 2b41839..e5b0713 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -4054,8 +4054,6 @@ int snd_soc_register_codec(struct device *dev,
 	return 0;
 
 fail:
-	kfree(codec->reg_def_copy);
-	codec->reg_def_copy = NULL;
 	kfree(codec->name);
 	kfree(codec);
 	return ret;