cpufreq: qcom-cpufreq-hw: Add cpufreq qos for LMh

Before update thermal pressure, the max cpufreq should be limited.
Add QOS control for Lmh throttle cpufreq.

Signed-off-by: Xuewen Yan <xuewen.yan@unisoc.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>