migrate_pages(): fix failure counting for retry

After 10 retries, we will give up and the remaining pages will be counted
as failure in nr_failed and nr_thp_failed.  We should count the failure in
nr_failed_pages too.  This is done in this patch.

Link: https://lkml.kernel.org/r/20220817081408.513338-8-ying.huang@intel.com


Fixes: 5984fabb ("mm: move_pages: report the number of non-attempted pages")
Signed-off-by: "Huang, Ying" <ying.huang@intel.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Reviewed-by: Oscar Salvador <osalvador@suse.de>
Cc: Zi Yan <ziy@nvidia.com>
Cc: Yang Shi <shy828301@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>