btrfs: simplify insert_orphan_item

We can search and add the orphan item in one go,
btrfs_insert_orphan_item will find out if the item already exists.

Signed-off-by: David Sterba <dsterba@suse.cz>
This commit is contained in:
David Sterba 2015-01-02 19:12:57 +01:00
commit 9c4f61f01d