mm: change type of parameter for memory_notify

mm: change type of parameter for memory_notify

memory_notify() is responsible for sending events related to memory
hotplugging to a notification queue.  Since all the events must match one
of the values from the enum memory_block_state, it is appropriate to
change the function parameter type to make this condition explicit at
compile time.

Link: https://lkml.kernel.org/r/20251029195617.2210700-4-linux@israelbatista.dev.br
Signed-off-by: Israel Batista <linux@israelbatista.dev.br>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Omar Sandoval <osandov@osandov.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>