mm/huge_memory: use RMAP_NONE when calling page_add_anon_rmap()

It's more convenient and readable to use RMAP_NONE instead of false when
calling page_add_anon_rmap().  No functional change intended.

Link: https://lkml.kernel.org/r/20230713120557.218592-1-linmiaohe@huawei.com


Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>