[1/2] cpufreq: unified governor and scaling min and max switching

governor scaling_min_freq and scaling_max_freq will be populated to all online cpus immediately

Change-Id: I610c5aeadd1eed8618f27d541834912e109ae5a4
[2/2] cpufreq: unified governor and scaling min and max switching

use related_cpus to apply correctly to new online cpus

Change-Id: Ibb2bbcf11e86858603f2b42931bf44c897859d25