hh: Tune interactive governor

 * Enable io_is_busy
 * Decrease hispeed_freq to avoid ramping voltage.
 * Match input_boost_freq to hispeed_freq for same reason
 * Lower sync_threshold to reduce jank from hotplug

 * No performance differences are apparent, and power draw should
   be lower in this configuration.

Change-Id: I68245da6008a76646e3936c8ce75806f1ffea0a4