drivers/base/memory: correct the field name in the header

drivers/base/memory: correct the field name in the header

Replace @blocks with @memory_blocks to match with the definition of struct
memory_group.

Link: https://lkml.kernel.org/r/20250311233045.148943-3-gshan@redhat.com
Signed-off-by: Gavin Shan <gshan@redhat.com>
Acked-by: David Hildenbrand <david@redhat.com>
Acked-by: Oscar Salvador <osalvador@suse.de>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>