migration/multifd: Add a wrapper for channels_created

We'll need to access multifd_send_state->channels_created from outside
multifd.c, so introduce a helper for that.

Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
Link: https://lore.kernel.org/r/20240229153017.2221-17-farosas@suse.de
Signed-off-by: Peter Xu <peterx@redhat.com>
2 files changed