msm: cpufreq: sync with upstream msm-3.4

Change-Id: I011154d6af1e1b92e79944397788670771cd5f39
trace: power: Adding trace events for cpufreq

Added two events to help debugging cpufreq:
1) cpufreq_sampling_event: To capture governor sampling instants
   when cpu load is evaluated and an appropriate frequency is
   selected.
2) cpufreq_freq_synced: to capture frequency synchronization of
   destination cpu with the source cpu triggered by foreground
   thread migrations.

Change-Id: I75bc7c3104b6e0750d9ede95602098d335f4f533
Signed-off-by: Rohit Gupta <rohgup@codeaurora.org>
Merge "msm: cpufreq: sync with upstream msm-3.4" into cm-10.2
Merge "trace: power: Adding trace events for cpufreq" into cm-10.2