Revert "Revert "msm: kgsl: Run the idle timer while the GPU is not power collapsed""

This reverts commit 295ba58ba5a78b27c287b4538521a65ca7a0d91f.
interactive gov: fixed wrong boostpulse_duration_val size (usec->msec)
hotplug: some apps don't use core 3 if 2 is deactivated, so it on- and offlines the cores in a row now; also tweaked coreboost