Revert "cpufreq: interactive: run at fraction of hispeed_freq when load is low"

This reverts commit a63609b3e56f22485b2877daccc38d630e4b3846.
pm: cpufreq: boost cpu frequency API support

This patch introduces boost sysfs interface which would enable the
govenor to ack any request for running the system at max freq just before
the system is going to be loaded. The next sample time would be decided
based on the user configured timeout value or the default (0) usec.

To set boost timeout:
echo <in usec> > /sys/devices/system/cpu/cpufreq/interactive/boost_timeout

To enable boost:
echo 1 > /sys/devices/system/cpu/cpu0/cpufreq/boost_cpufreq

Change-Id: I06840c1b27ecef326f48c24d37be452fdf65a001
Signed-off-by: Ruslan Bilovol <ruslan.bilovol@ti.com>

Conflicts:
	drivers/cpufreq/cpufreq_interactive.c