bcachefs: btree_node_scan: Respect member.data_allowed

If a device wasn't used for btree nodes, no need to scan for them.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2024-04-09 18:50:27 -04:00
commit 9b31152fd7