sched: style cleanups

style cleanup of various changes that were done recently.

no code changed:

      text    data     bss     dec     hex filename
     23680    2542      28   26250    668a sched.o.before
     23680    2542      28   26250    668a sched.o.after
Signed-off-by: Ingo Molnar <mingo@elte.hu>