s390/cmm: Removed useless label

Rewrote conditional statement and eliminated the out_kthread label.

Signed-off-by: Alexandru Gheorghiu <gheorghiuandru@gmail.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
diff --git a/arch/s390/mm/cmm.c b/arch/s390/mm/cmm.c
index 479e9428..9d84a1f 100644
--- a/arch/s390/mm/cmm.c
+++ b/arch/s390/mm/cmm.c
@@ -458,12 +458,10 @@
 	if (rc)
 		goto out_pm;
 	cmm_thread_ptr = kthread_run(cmm_thread, NULL, "cmmthread");
-	rc = IS_ERR(cmm_thread_ptr) ? PTR_ERR(cmm_thread_ptr) : 0;
-	if (rc)
-		goto out_kthread;
-	return 0;
+	if (!IS_ERR(cmm_thread_ptr))
+		return 0;
 
-out_kthread:
+	rc = PTR_ERR(cmm_thread_ptr);
 	unregister_pm_notifier(&cmm_power_notifier);
 out_pm:
 	unregister_oom_notifier(&cmm_oom_nb);