Revert "mach-ux500: prcmu-qos-pm: ignore ab8500-usb APE requirement"

Some users reported that touchscreen looses response sometimes, when watching online video with connected charger/USB.
ab8500-usb: add interface to ignore APE_100_OPP requirement

Signed-off-by: Shilin Victor <chrono.monochrome@gmail.com>