mm/z3fold: use helper function put_z3fold_locked() and put_z3fold_locked_list()

This code is already duplicated six times, use helper function
put_z3fold_locked() to release z3fold page instead of open code it to help
improve code readability a bit.  And add put_z3fold_locked_list() helper
function to be consistent with it.  No functional change involved.

Link: https://lkml.kernel.org/r/20230803113824.886413-1-ruanjinjie@huawei.com


Signed-off-by: Ruan Jinjie <ruanjinjie@huawei.com>
Reviewed-by: Miaohe Lin <linmiaohe@huawei.com>
Cc: Vitaly Wool <vitaly.wool@konsulko.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>