Added scheduler logging facilities

Change-Id: I4ca8ec708d73c51e1d1a1ad1538a9ba0b0028ecb
cpu frequency logging

Change-Id: Iab0f96ac9077a62b50060bb09af58680263666a6
cpufreq updates tied to scheduler

Change-Id: I46858d79f2233496af7879eaa97affb49360cc9d