btrfs: make btrfs_add_ordered_extent_compress take btrfs_inode

It simpy forwards its inode argument to __btrfs_add_ordered_extent which
already takes btrfs_inode.

Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>