Revert "different way of protecting phone from going to deepsleep on calls. Needs some serious testing"

This reverts commit 6baf86a4a9795c9dfe980353fdaf609e03ef2c68.
Restoring earlysuspend.c to original state
add proximity sensor gpio to wakepad
some enhancements to undervolted dvfs
pinmux suspending for uart
small optimization to defconfig
usb hotplug disabled
disabling temporary pinmux control on suspend/resume