bcachefs: Promotes should use BCH_WRITE_only_specified_devs

Promotes, like most other internal moves, should only go to the
specified target and not fall back to allocating from the full
filesystem.

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
This commit is contained in:
Kent Overstreet 2025-01-19 13:11:24 -05:00
commit 8ff92a9e4e