cpufreq: intellidemand: Fix optimal_freq logic on ramp down

When ondemand governor decides to ramp down the frequency, the missing
check for frequency being lower than optimal_freq was causing frequency
to be ramped down to optimal_freq even if the frequency decided by ondemand
governor was higher.

Change-Id: I00f9ae4c61ccda4039f3338dee2c29b8cb790be4
Signed-off-by: Veena Sambasivan <veenas@codeaurora.org>
Signed-off-by: Paul Reioux <reioux@gmail.com>
intellidemand: tweak optimal for krait 600 series

Signed-off-by: Paul Reioux <reioux@gmail.com>
intellidemand: enable sec_touchscreen input boosting

Signed-off-by: Paul Reioux <reioux@gmail.com>
intellidemand: set default sampling rate to 50k

Signed-off-by: Paul Reioux <reioux@gmail.com>
intellidemand: re-enable performance lock option

with low freq enabled kernels, minimum performance lock will help music
playback to be smooth and glitch free

Signed-off-by: Paul Reioux <reioux@gmail.com>
Intellidemand: limit min cpu perflock to boot cpu only

Signed-off-by: Paul Reioux <reioux@gmail.com>