defconfig: enable and set itneractive governor as default

Change-Id: I6549e2c49be2fe416951ec1d76de080dc9311041
cpufreq: interactive: backport to linux 3.0

use cputime64_t because u64 arrays aren't implemented yet.

Change-Id: I79616c5d6b63e5584558fcf878c09d8e59a02252