mm/damon/lru_sort: deduplicate hot/cold schemes generators

mainline inclusion
from mainline-v6.2-rc6
commit a62518ab
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I6MRUG

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=a62518ab1da4eb8bf0335c0e254b3e82e9ce222e

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damon_lru_sort_new_{hot,cold}_scheme() have quite a lot of duplicates.
This commit factors out the duplicate to a separate function and use it
for reducing the duplicate.

Link: https://lkml.kernel.org/r/20220913174449.50645-23-sj@kernel.org


Signed-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ze Zuo <zuoze1@huawei.com>