cpufreq: ondemand: Fix the boostpulse interface

  * Boostpulse was not working because no default frequency was set.
  * We don't need an input handler to push the freq to max, userspace
    does a better job with the Power HAL.
  * Tweak boost time to 500ms

Change-Id: Ice8c26b758747d265976263296a2da3380b864f7
cpufreq: ondemand: Fix boostfreq value

8x55 standard frequency is 1017600

Change-Id: I2d51a44078ba2df6ebb8e6f150d978c51e54bf25