ANDROID: mm: page_pinner: skip marking failure on freeable pages

Sometime, pages are temporarily pinnned during migration and the migration
fails. However, putback_movable_pages will end up freeing them if their
page refcount are 1. Thus, it doesn't need to mark them as failure, which
just consumes page_pinner logbuffer to lose old history.

Bug: 188908895
Signed-off-by: Minchan Kim <minchan@google.com>
Change-Id: I8564b72b212a5095cfe3ba6bf5622a9b62f5b455