msm_cpufreq_limit: add GPL V2 licensing to access to GPL symbols

Signed-off-by: faux123 <reioux@gmail.com>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>
cpufreq_limit: remove unused vars

Signed-off-by: faux123 <reioux@gmail.com>
Signed-off-by: Pranav Vashi <neobuddy89@gmail.com>