cpumask: use new cpumask functions throughout x86

Impact: cleanup

1) &cpu_online_map -> cpu_online_mask
2) first_cpu/next_cpu_nr -> cpumask_first/cpumask_next
3) cpu_*_map manipulation -> init_cpu_* / set_cpu_*

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h
index f8b833e..1ce1e1a 100644
--- a/arch/x86/include/asm/topology.h
+++ b/arch/x86/include/asm/topology.h
@@ -174,11 +174,11 @@
 
 static inline const cpumask_t *cpumask_of_node(int node)
 {
-	return &cpu_online_map;
+	return cpu_online_mask;
 }
 static inline int node_to_first_cpu(int node)
 {
-	return first_cpu(cpu_online_map);
+	return cpumask_first(cpu_online_mask);
 }
 
 static inline void setup_node_to_cpumask_map(void) { }