ghost: Fix msm_hotplug configuration and make it more conservative

It is working quite well for now, will test more with these conservative tunables.

Signed-off-by: Zhao Wei Liew <zhaoweiliew@gmail.com>
msm: board-8064: Lower minimum voltages for CPU

To enable undervolting of more than 50uV

Signed-off-by: Zhao Wei Liew <zhaoweiliew@gmail.com>