mm,slub: use node-notifier instead of memory-notifier

mm,slub: use node-notifier instead of memory-notifier

slub is only concerned when a numa node changes its memory state, so stop
using the memory notifier and use the new numa node notifer instead.

[akpm@linux-foundation.org: slub.c needs node.h for struct node_notify]
Link: https://lore.kernel.org/oe-kbuild-all/202506202144.dGkFxasv-lkp@intel.com/
Link: https://lkml.kernel.org/r/20250616135158.450136-5-osalvador@suse.de
Signed-off-by: Oscar Salvador <osalvador@suse.de>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Reviewed-by: Harry Yoo <harry.yoo@oracle.com>
Reviewed-by: Vlastimil Babka <vbabka@suse.cz>
Acked-by: David Hildenbrand <david@redhat.com>
Cc: Hyeonggon Yoo <42.hyeyoo@gmail.com>
Cc: Rakie Kim <rakie.kim@sk.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>