blu_active: Modify sync_freq implementation, Check actual freq before setting new freq, Remove input boost

Signed-off-by: engstk <eng.stk@sapo.pt>
cpufreq: cpu-boost: Add cpu-boost driver

Signed-off-by: engstk <eng.stk@sapo.pt>
defconfig: enable cpu-boost

Signed-off-by: engstk <eng.stk@sapo.pt>
cpufreq: cpu-boost: Use hotplug thread infrastructure

Signed-off-by: engstk <eng.stk@sapo.pt>