defconfig: msmcortex: Enable performance driver

This module provides support to userspace entity for hotplugging
and setting cpufreq policy min/max limits. It can also detect
cpu/io workload and notify userspace via sysfs nodes.

A userspace entity can specify a CPU mask and the number of CPUs
it wants online within that mask and this module will try to make
a best effort to keep those many CPUs online. Userspace can also
specify the min and max limits on CPUs instead of writing to the
scaling_min/max nodes from sysfs so that if any CPU is offline
this module maintains a vote for it which is applied
once the CPU comes back online.

A userspace entity can also set threshold value in sysfs nodes of
this module for cpu/io workload detection and this module can notify
userspace entity when that crietia is met via sysfs nodes.

Change-Id: I2c92b689ae49af85489dbf9a6aef196f4f6abf4b
Signed-off-by: Tapas Kumar Kundu <tkundu@codeaurora.org>

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