cpumask: fix cpu-hotplug documentation

It refers to an obsolete function.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: linux-doc@vger.kernel.org
diff --git a/Documentation/cpu-hotplug.txt b/Documentation/cpu-hotplug.txt
index a0b005d..f9ad5e0 100644
--- a/Documentation/cpu-hotplug.txt
+++ b/Documentation/cpu-hotplug.txt
@@ -108,7 +108,7 @@
 	for_each_possible_cpu     - Iterate over cpu_possible_mask
 	for_each_online_cpu       - Iterate over cpu_online_mask
 	for_each_present_cpu      - Iterate over cpu_present_mask
-	for_each_cpu_mask(x,mask) - Iterate over some random collection of cpu mask.
+	for_each_cpu(x,mask)      - Iterate over some random collection of cpu mask.
 
 	#include <linux/cpu.h>
 	get_online_cpus() and put_online_cpus():