overall_stats: add overall stats for all available cores

this is much more accurate stats tracking than just displaying core 0's
stats from most other kernels

Signed-off-by: faux123 <reioux@gmail.com>
overall_stats: make dual/quad core stats configurable via meunconfig

Signed-off-by: faux123 <reioux@gmail.com>
overall_stats: forward port to kernel 3.4+

by replacing deprecated functions with native add/sub for 64bit data types

Signed-off-by: faux123 <reioux@gmail.com>
arch/arm/mach-msm/mpm-of.c: gcc 4.9.x fix up

Signed-off-by: Paul Reioux <reioux@gmail.com>
Fix cpufreq warning