tests/eas/load_tracking: Remove dependency on EnergyModel
tests/eas/load_tracking: Remove dependency on EnergyModel

This test requires only the max capacities of the CPUs, which is
available in sysfs in mainline (from v4.10). Instead of requiring a
full EnergyModel, just use those files.

mdigiorgio/lisa,credp/lisa,credp/lisa,ARM-software/lisa,arnoldlu/lisa,mdigiorgio/lisa,credp/lisa,ARM-software/lisa,bjackman/lisa,bjackman/lisa,arnoldlu/lisa,credp/lisa,ARM-software/lisa,ARM-software/lisa