mach-ux500/prcmu-qos-power: disable APE/DDR boost at freq > 400MHz

We can do it from liveOPP now
LiveOPP: make liveopp sysfs code more readable and compact
LiveOPP: make liveOPP functions inline since they are used only once
LiveOPP: more verbose liveOPP entries
u8500_hotplug