cpumask: prepare for iterators to only go to nr_cpu_ids/nr_cpumask_bits.: cris

Impact: cleanup, futureproof

In fact, all cpumask ops will only be valid (in general) for bit
numbers < nr_cpu_ids.  So use that instead of NR_CPUS in various
places.

This is always safe: no cpu number can be >= nr_cpu_ids, and
nr_cpu_ids is initialized to NR_CPUS at boot.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Acked-by: Ingo Molnar <mingo@elte.hu>

arch/cris/kernel/setup.c

@@ -166,7 +166,7 @@ void __init setup_arch(char **cmdline_p)
 
 static void *c_start(struct seq_file *m, loff_t *pos)
 {
-	return *pos < NR_CPUS ? (void *)(int)(*pos + 1): NULL;
+	return *pos < nr_cpu_ids ? (void *)(int)(*pos + 1) : NULL;
 }
 
 static void *c_next(struct seq_file *m, void *v, loff_t *pos)