s390/topology: use for_each_set_bit to simplify the code

---
 arch/s390/kernel/topology.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)
 
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index 30c8533..54d93f4 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -73,10 +73,7 @@ static struct mask_info *add_cpus_to_mask(struct topology_cpu *tl_cpu,
 {
 	unsigned int cpu;
 
-	for (cpu = find_first_bit(&tl_cpu->mask[0], TOPOLOGY_CPU_BITS);
-	     cpu < TOPOLOGY_CPU_BITS;
-	     cpu = find_next_bit(&tl_cpu->mask[0], TOPOLOGY_CPU_BITS, cpu + 1))
-	{
+	for_each_set_bit(cpu, &tl_cpu->mask[0], TOPOLOGY_CPU_BITS) {
 		unsigned int rcpu;
 		int lcpu;