ramdisk: Balance out cpu-boost tunables

* Reduce input boost ms to 40ms, while adding support
for migration boosts to maintain smoothness.
* Minimal performance differences should be seen while
providing slightly better battery life.

Signed-off-by: Zhao Wei Liew <zhaoweiliew@gmail.com>
ramdisk: Re-tune above_hispeed_delay and target_loads

Signed-off-by: Zhao Wei Liew <zhaoweiliew@gmail.com>