arm: tegra: grouper:  Use nvmap.h include file from kernel/include

Use nvmap.h include file from kernel/include instead of mach-tegra/include.
Bug 854182
arm: tegra: governor: grouper: change governor using cpufreq interface

Older code sets "conservative" governor in early-suspend
using sysfs entries.This implementation changes governor
in early-suspend using cpufreq interfaces.

bug 871958