btrfs: use helper to set ulist aux from a qgroup

We have a nice helper to do proper casting of a qgroup to a ulist aux
value. And several places that could make use of it.

Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba 2018-03-27 19:04:50 +02:00
commit a1840b5023