ext4: fix ref counting for ea_inode

The ref count on ea_inode is incremented by
ext4_xattr_inode_orphan_add() which is supposed to be decremented by
ext4_xattr_inode_array_free(). The decrement is conditioned on whether
the ea_inode is currently on the orphan list. However, the orphan list
addition only happens when journaling is enabled. In non-journaled case,r
we fail to release the ref count causing an error message like below.

"VFS: Busy inodes after unmount of sdb. Self-destruct in 5 seconds.
Have a nice day..."
Signed-off-by: Tahsin Erdogan <tahsin@google.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>

fs/ext4/xattr.c

@@ -2096,8 +2096,7 @@ ext4_xattr_inode_array_free(struct inode *inode,
 		if (err)
 			continue;
 		/* for inode's i_count get from ext4_xattr_delete_inode */
-		if (!list_empty(&EXT4_I(ea_inode)->i_orphan))
-			iput(ea_inode);
+		iput(ea_inode);
 		clear_nlink(ea_inode);
 		iput(ea_inode);
 	}