selinux: drop return statement at end of void functions

Those return statements at the end of a void function are redundant.

Reported by clang-tidy [readability-redundant-control-flow]
Signed-off-by: Christian Göttsche <cgzones@googlemail.com>
Signed-off-by: Paul Moore <paul@paul-moore.com>

security/selinux/hooks.c

@@ -3284,8 +3284,6 @@ static void selinux_inode_post_setxattr(struct dentry *dentry, const char *name,
 	isec->sid = newsid;
 	isec->initialized = LABEL_INITIALIZED;
 	spin_unlock(&isec->lock);
-
-	return;
 }
 
 static int selinux_inode_getxattr(struct dentry *dentry, const char *name)

security/selinux/ss/conditional.c

@@ -566,8 +566,6 @@ void cond_compute_xperms(struct avtab *ctab, struct avtab_key *key,
 		if (node->key.specified & AVTAB_ENABLED)
 			services_compute_xperms_decision(xpermd, node);
 	}
-	return;
-
 }
 /* Determine whether additional permissions are granted by the conditional
  * av table, and if so, add them to the result

security/selinux/ss/ebitmap.c

@@ -359,7 +359,6 @@ void ebitmap_destroy(struct ebitmap *e)
 
 	e->highbit = 0;
 	e->node = NULL;
-	return;
 }
 
 int ebitmap_read(struct ebitmap *e, void *fp)

security/selinux/ss/mls.c

@@ -156,7 +156,6 @@ void mls_sid_to_context(struct policydb *p,
 	}
 
 	*scontext = scontextp;
-	return;
 }
 
 int mls_level_isvalid(struct policydb *p, struct mls_level *l)

security/selinux/ss/services.c

@@ -529,8 +529,6 @@ static void security_dump_masked_av(struct policydb *policydb,
 	/* release scontext/tcontext */
 	kfree(tcontext_name);
 	kfree(scontext_name);
-
-	return;
 }
 
 /*