arch: arm: exynos: add 1.7 and 1.8GHz cpu steps

Signed-off-by: Humberto Borba <humberos@gmail.com>
drivers: cpufreq: add support for scaling available frequencies (sysfs)

Signed-off-by: Humberto Borba <humberos@gmail.com>
drivers: cpufreq: voltage control adjustments

Signed-off-by: Humberto Borba <humberos@gmail.com>
n80xx: update defconfig

Signed-off-by: Humberto Borba <humberos@gmail.com>