mm/damon/paddr: improve readability of damon_pa_stat

damon_pa_stat contains an unnecessary goto statement, and the if/else can
be re-written to be more readable.

This patch is written on top of SJ's patch series [1], which in turn is
written on top of another one of his series [2].

[1] https://lore.kernel.org/all/20241219040327.61902-1-sj@kernel.org/
[2] https://lore.kernel.org/all/20241213215306.54778-1-sj@kernel.org/

Link: https://lkml.kernel.org/r/20250113210201.446051-1-joshua.hahnjy@gmail.com
Signed-off-by: Joshua Hahn <joshua.hahnjy@gmail.com>
Reviewed-by: SeongJae Park <sj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Author: joshuahahn

mm/damon/paddr.c

@@ -513,11 +513,8 @@ static unsigned long damon_pa_stat(struct damon_region *r, struct damos *s,
 			continue;
 		}
 
-		if (damos_pa_filter_out(s, folio))
-			goto put_folio;
-		else
+		if (!damos_pa_filter_out(s, folio))
 			*sz_filter_passed += folio_size(folio);
-put_folio:
 		addr += folio_size(folio);
 		folio_put(folio);
 	}