[PATCH] small kernel/sched.c cleanup

- constify and optimize stat_nam (thanks to Michael Tokarev!)
- spelling and comment fixes

Signed-off-by: Andreas Mohr <andi@lisas.de>
Acked-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>