pmem: update to v6.9
Summary of Changes
Sync to upstream version 6.9. This includes various bug fixes as well as support for memory_hotplug.memmap_on_memory.
Approved Development Ticket
JIRA: https://issues.redhat.com/browse/RHEL-23824
Signed-off-by: Jeff Moyer jmoyer@redhat.com
Edited by Jeff Moyer