Number of parameters for 'damon_set_attrs()' is six.  As it could be
confusing and verbose, this commit reduces the number by receiving single
pointer to a 'struct damon_attrs'.

Link: https://lkml.kernel.org/r/20220913174449.50645-7-sj@kernel.orgSigned-off-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>