cpufreq: interactive: changing behavior of hispeed_freq

The current frequency will be (nearly) always lower than
hispeed_freq. So changing that to our 800 freq and pushing
cpu to max freq the first time. This should decrease frequency
jumps in theory.

Also updating suspend code a bit and change boost_duration
to 2secs. This needs confirmation, since in those 2 seconds
there shouldn't be any calculation to keep UI interactions
even smoother.

Signed-off-by: Blechd0se <alex.christ@hotmail.de>