mm/zswap.c: remove unnecessary parentheses
mm/zswap.c: remove unnecessary parentheses

Fix following trivial checkpatch error:

  ERROR: return is not a function, parentheses are not required

Signed-off-by: SeongJae Park <4e244449b52bf6ddddd07d261eea0e61e60df45e@gmail.com>
Acked-by: Seth Jennings <74ca843d8fa59bb3c472e2551935d3d1dafb5aea@variantweb.net>
Signed-off-by: Andrew Morton <5c1e68b099950c134891f0b6e179498a8ebe9cf9@linux-foundation.org>
Signed-off-by: Linus Torvalds <69652caca27c8b940640ad396ab71f93cacec34f@linux-foundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs