change header to specify 'on Linux'

Specify the test suite can be run on Linux because it is not
ARM specific.

Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Acked-by: Amit Kucheria <amit.kucheria@linaro.org>
diff --git a/cpufreq/cpufreq_06.sh b/cpufreq/cpufreq_06.sh
index cb75e7f..d67ce6d 100755
--- a/cpufreq/cpufreq_06.sh
+++ b/cpufreq/cpufreq_06.sh
@@ -1,6 +1,6 @@
 #!/bin/bash
 #
-# PM-QA validation test suite for the power management on ARM
+# PM-QA validation test suite for the power management on Linux
 #
 # Copyright (C) 2011, Linaro Limited.
 #