Conditionally Revert "put back the unused virtuals in Vector<>"

These symbols are needed for MR2 camera.tegra and other blobs,
but they conflict with KK blobs so define it for devices that
need it by setting COMMON_GLOBAL_CFLAGS += -DNEEDS_VECTORIMPL_SYMBOLS

Change-Id: I59e66074526f013918a29c3afc10e52b9812778c
init: fixup cpufreq permissions

It is safe to have read permissions for everyone
Also required for the CPU info overlay service

PS3:
add cpu0-cpu3

PS4:
mke this work on at least a few devices :)

Change-Id: I1de067f63121a8a19f29d4e994fbc3bf73054556