mm/damon: simplify scheme create in damon_lru_sort_apply_parameters

In damon_lru_sort_apply_parameters(), we can use damon_set_schemes() to
replace the way of creating the first 'scheme' in original code, this
makes the code look cleaner.

Link: https://lkml.kernel.org/r/20220911005917.835-1-xhao@linux.alibaba.com


Signed-off-by: Xin Hao <xhao@linux.alibaba.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>