msm: clock-krait-8974: User voltage control for msm-cpufreq device

Signed-off-by: flar2 <asegaert@gmail.com>
Adjust min and max voltage limits

Signed-off-by: flar2 <asegaert@gmail.com>
Change auto undervolting to use min freq only and adjust oc voltages

Signed-off-by: flar2 <asegaert@gmail.com>
update defconfig