intellidemand: set default sampling rate to 50k

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