staging: erofs: use xattr_prefix to wrap up

Let's use xattr_prefix instead of open code.
No logic changes.

Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <gaoxiang25@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Gao Xiang 2019-01-29 16:35:19 +08:00 • committed by Greg Kroah-Hartman
commit a24df1f62f