change URLs in the header files

Rename them to cpufreq_* instead of test_*. That will allow to add
the other subsystem blocks without name conflict.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
diff --git a/cpufreq/test_02.sh b/cpufreq/test_02.sh
index 0b3216e..212b2eb 100755
--- a/cpufreq/test_02.sh
+++ b/cpufreq/test_02.sh
@@ -23,7 +23,7 @@
 #       - initial API and implementation
 #
 
-# URL : https://wiki.linaro.org/WorkingGroups/PowerManagement/Doc/QA/Scripts#test_02
+# URL : https://wiki.linaro.org/WorkingGroups/PowerManagement/Doc/QA/Scripts#cpufreq_02
 
 source ../include/functions.sh