staging: android: ion: hisilicon: Remove useless return variables

This patch removes unnecessary return variables and compresses the
return logic.
The coccinelle script that finds and fixes this issue is:
@@ type T; identifier i,f; constant C; @@
- T i;
...when != i
when strict
( return -C;
|
- i =
+ return
f(...);
- return i;
)

Signed-off-by: Bhaktipriya Shridhar <bhaktipriya96@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/android/ion/hisilicon/hi6220_ion.c

@@ -214,10 +214,7 @@ static struct platform_driver hi6220_ion_driver = {
 
 static int __init hi6220_ion_init(void)
 {
-	int ret;
-
-	ret = platform_driver_register(&hi6220_ion_driver);
-	return ret;
+	return platform_driver_register(&hi6220_ion_driver);
 }
 
 subsys_initcall(hi6220_ion_init);