core: use performance variant for_each_cpu_mask_nr

Change references from for_each_cpu_mask to for_each_cpu_mask_nr
where appropriate

Reviewed-by: Paul Jackson <pj@sgi.com>
Reviewed-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Mike Travis <travis@sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

diff --cc kernel/cpu.c
Simple merge

diff --cc kernel/rcuclassic.c
Simple merge

diff --cc kernel/rcupreempt.c
Simple merge

diff --cc kernel/sched.c
Simple merge

diff --cc kernel/sched_fair.c
Simple merge

diff --cc kernel/sched_rt.c
Simple merge

diff --cc kernel/taskstats.c
Simple merge

diff --cc kernel/workqueue.c
Simple merge