[PATCH] cpuset: minor spacing initializer fixes

Four trivial cpuset fixes: remove extra spaces, remove useless initializers,
mark one __read_mostly.

Signed-off-by: Paul Jackson <pj@sgi.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>