msm: rq_stats: Use cpufreq API to get the current frequency

Since the acpuclock APIs are deprecated, use the cpufreq to
get the current frequency of CPUs to calculate the cpu
normalized load value.

Change-Id: I6e381d584d6725ef964bad86c835d44f3046e9c3
Signed-off-by: Archana Sathyakumar <asathyak@codeaurora.org>
msm: rq_stats: Fix wrong usage of cpufreq_quick_get()

cpufreq_quick_get() returns frequency in KHz, which is exactly what
cur_freq expect. Remove the wrong multiplication.

CRs-fixed: 645518
Change-Id: Ia8b080a188023964f5eee77c8586828097d11ad4
Signed-off-by: Junjie Wu <junjiew@codeaurora.org>
msm: rq_stats: update related_cpus in the cpu_load runtime

"related_cpu" indicates the list of CPUs that need some
sort of frequency coordination, whether software or hardware.
ex:- if all cpus shares the same clock, all 4 cpus belongs to
related_cpus.

cpufreq driver updates the related_cpus during hotplug offline/online
events. Hence update related_cpus for all cpus during hotplug notifier.

CRs-fixed: 548631
Change-Id: I6543ddaeebf73d18334066b090ee7c4a72466e4a
Signed-off-by: Anji Jonnala <anjir@codeaurora.org>