soc: qcom: rq_stats: Pass correct cpu id to update_average_load function

Pass correct cpu number to update_average_load function
from cpufreq_transition_handler function. Also avoid div by zero
condition in update_average_load function.

CRs-Fixed: 708310
Change-Id: I4ec3e54b92c760ac5fa910542524fdfe919f55e9
Signed-off-by: Prasad Sodagudi <psodagud@codeaurora.org>
[zwliew: Backport to msm-3.4]
Signed-off-by: Zhao Wei Liew <zhaoweiliew@gmail.com>

Conflicts:
	arch/arm/mach-msm/msm_rq_stats.c