mm/damon/sysfs-schemes: set damos->migrate_dests

Pass user-specified multiple DAMOS action destinations and their weights
to DAMON core API, so that user requests can really work.

Link: https://lkml.kernel.org/r/20250709005952.17776-5-bijan311@gmail.com


Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Bijan Tabatabai <bijantabatab@micron.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Ravi Shankar Jonnalagadda <ravis.opensrc@micron.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>