MAINTAINERS: Add bug tracking system location entry for cpufreq

The kernel Bugzilla is used for tracking cpufreq bugs, so document
that.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Len Brown <len.brown@intel.com>
1 file changed