cpufreq: smartmax: reworked and update smartmax for g2
defconfig: g2: enable smartmax gov

Signed-off-by: houst0nn <houstonn@gmail.com>
Added CPUfreq governor 'wheatley'

Thanks to r_data for taking the time to fix all the build errors for the Nexus 4.
defconfig: g2: enable wheatley gov