Make PREEMPT_BKL depend on PREEMPT alone - doesnt make sense to enable it
on SMP && !PREEMPT kernels.  (other than testing.)
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>