Revert "Test: sc3cfb_ops: Reduce sleep_on_timeout"

This reverts commit 799128d6feef4441cdf109a0b476df7eee62dc14.
Revert "Test: sc3fb: Adjust VSYNC_TIMEOUT_MSEC to 10"

This reverts commit 2ccab5073129358e5c2864760bd04c033b6732c0.
Revert "timer: Optimise apply_slack() for size and speed"

This reverts commit 9d0db41a4208df554563d67c0e3d915c630fd399.
Revert "pegasusq: adjust up_threshold, down_freq"

This reverts commit 09483ff994da574986daf5e6a18741a926b6bfb4.
Revert "Test: sched: Reduce sleep duration in wait_task_inactive"

This reverts commit 45014cc753347cbe4dab281ef2e5e28a1e79a338.